diff --git a/esphome/components/ili9xxx/__init__.py b/esphome/components/ili9xxx/__init__.py
index e69de29bb2d..84888bbabcb 100644
--- a/esphome/components/ili9xxx/__init__.py
+++ b/esphome/components/ili9xxx/__init__.py
@@ -0,0 +1,4 @@
+DEPRECATED_COMPONENT = """
+The 'ili9xxx' component is deprecated and no new models will be added to it.
+New model PRs should target the newer and more performant 'mipi_spi' component.
+"""
diff --git a/esphome/components/ili9xxx/display.py b/esphome/components/ili9xxx/display.py
index 185a74fa41d..1f20b21a0e8 100644
--- a/esphome/components/ili9xxx/display.py
+++ b/esphome/components/ili9xxx/display.py
@@ -219,6 +219,9 @@ FINAL_VALIDATE_SCHEMA = final_validate
 
 
 async def to_code(config):
+    LOGGER.warning(
+        "The 'ili9xxx' component is deprecated, it is recommended to use 'mipi_spi' instead."
+    )
     rhs = MODELS[config[CONF_MODEL]].new()
     var = cg.Pvariable(config[CONF_ID], rhs)
 
diff --git a/esphome/components/modbus_controller/modbus_controller.cpp b/esphome/components/modbus_controller/modbus_controller.cpp
index 3c4ceaf62de..5c3b39c9548 100644
--- a/esphome/components/modbus_controller/modbus_controller.cpp
+++ b/esphome/components/modbus_controller/modbus_controller.cpp
@@ -376,7 +376,7 @@ size_t ModbusController::create_register_ranges_() {
   while (ix != this->sensorset_.end()) {
     SensorItem *curr = *ix;
 
-    ESP_LOGV(TAG, "Register: 0x%X %d %d %d offset=%u skip=%u addr=%p", curr->start_address, curr->register_count,
+    ESP_LOGV(TAG, "Register: 0x%X %d %d %zu offset=%u skip=%u addr=%p", curr->start_address, curr->register_count,
              curr->offset, curr->get_register_size(), curr->offset, curr->skip_updates, curr);
 
     if (r.register_count == 0) {
@@ -484,18 +484,18 @@ void ModbusController::dump_config() {
 #if ESPHOME_LOG_LEVEL >= ESPHOME_LOG_LEVEL_VERBOSE
   ESP_LOGCONFIG(TAG, "sensormap");
   for (auto &it : this->sensorset_) {
-    ESP_LOGCONFIG(TAG, " Sensor type=%zu start=0x%X offset=0x%X count=%d size=%d",
+    ESP_LOGCONFIG(TAG, " Sensor type=%u start=0x%X offset=0x%X count=%d size=%zu",
                   static_cast<uint8_t>(it->register_type), it->start_address, it->offset, it->register_count,
                   it->get_register_size());
   }
   ESP_LOGCONFIG(TAG, "ranges");
   for (auto &it : this->register_ranges_) {
-    ESP_LOGCONFIG(TAG, "  Range type=%zu start=0x%X count=%d skip_updates=%d", static_cast<uint8_t>(it.register_type),
+    ESP_LOGCONFIG(TAG, "  Range type=%u start=0x%X count=%d skip_updates=%d", static_cast<uint8_t>(it.register_type),
                   it.start_address, it.register_count, it.skip_updates);
   }
   ESP_LOGCONFIG(TAG, "server registers");
   for (auto &r : this->server_registers_) {
-    ESP_LOGCONFIG(TAG, "  Address=0x%02X value_type=%zu register_count=%u", r->address,
+    ESP_LOGCONFIG(TAG, "  Address=0x%02X value_type=%u register_count=%u", r->address,
                   static_cast<uint8_t>(r->value_type), r->register_count);
   }
 #endif
@@ -524,7 +524,7 @@ void ModbusController::on_write_register_response(ModbusRegisterType register_ty
 void ModbusController::dump_sensors_() {
   ESP_LOGV(TAG, "sensors");
   for (auto &it : this->sensorset_) {
-    ESP_LOGV(TAG, "  Sensor start=0x%X count=%d size=%d offset=%d", it->start_address, it->register_count,
+    ESP_LOGV(TAG, "  Sensor start=0x%X count=%d size=%zu offset=%d", it->start_address, it->register_count,
              it->get_register_size(), it->offset);
   }
 }
diff --git a/esphome/components/st7735/__init__.py b/esphome/components/st7735/__init__.py
index ba854bb0ae0..62dfa6f4136 100644
--- a/esphome/components/st7735/__init__.py
+++ b/esphome/components/st7735/__init__.py
@@ -1,3 +1,8 @@
 import esphome.codegen as cg
 
 st7735_ns = cg.esphome_ns.namespace("st7735")
+
+DEPRECATED_COMPONENT = """
+The 'st7735' component is deprecated and no new models will be added to it.
+New model PRs should target the newer and more performant 'mipi_spi' component.
+"""
diff --git a/esphome/components/st7735/display.py b/esphome/components/st7735/display.py
index 9dc69f27ff1..766370c21f2 100644
--- a/esphome/components/st7735/display.py
+++ b/esphome/components/st7735/display.py
@@ -1,3 +1,5 @@
+import logging
+
 from esphome import pins
 import esphome.codegen as cg
 from esphome.components import display, spi
@@ -15,6 +17,7 @@ from esphome.const import (
 from . import st7735_ns
 
 CODEOWNERS = ["@SenexCrenshaw"]
+LOGGER = logging.getLogger(__name__)
 
 DEPENDENCIES = ["spi"]
 
@@ -87,6 +90,9 @@ async def setup_st7735(var, config):
 
 
 async def to_code(config):
+    LOGGER.warning(
+        "The 'st7735' component is deprecated, it is recommended to use 'mipi_spi' instead."
+    )
     var = cg.new_Pvariable(
         config[CONF_ID],
         config[CONF_MODEL],
diff --git a/esphome/components/web_server/web_server.h b/esphome/components/web_server/web_server.h
index 51a9c9d9d63..8e8b1de8c4b 100644
--- a/esphome/components/web_server/web_server.h
+++ b/esphome/components/web_server/web_server.h
@@ -169,7 +169,7 @@ class DeferredUpdateEventSourceList final : public std::list<DeferredUpdateEvent
   void on_client_disconnect_(DeferredUpdateEventSource *source);
 
  public:
-  /// Returns true if there are still connected clients.
+  /// Returns true if there are event sources remaining (including pending cleanup).
   bool loop();
 
   void deferrable_send_state(void *source, const char *event_type, message_generator_t *message_generator);
diff --git a/esphome/components/web_server_idf/web_server_idf.h b/esphome/components/web_server_idf/web_server_idf.h
index 7137e294fad..f2931fb5079 100644
--- a/esphome/components/web_server_idf/web_server_idf.h
+++ b/esphome/components/web_server_idf/web_server_idf.h
@@ -340,7 +340,7 @@ class AsyncEventSource : public AsyncWebHandler {
 
   void try_send_nodefer(const char *message, const char *event = nullptr, uint32_t id = 0, uint32_t reconnect = 0);
   void deferrable_send_state(void *source, const char *event_type, message_generator_t *message_generator);
-  /// Returns true if there are still connected clients.
+  /// Returns true if there are sessions remaining (including pending cleanup).
   bool loop();
   bool empty() { return this->count() == 0; }