And at $40, this is relatively expensive for the amount of power. You can find a ESP32 dev board on AliExpress for about $5, shipping included. It is obviously much cheaper if you buy the chips in bulk.
Here, you are mostly paying for the smartwatch package, not the brain.
the best bang for buck board right now is the esp32-s2 based s2 mini. Its great for doing anything usb attached (keyboard, gamepads, mice, anything really). Its about 2,50EUR at its cheapest including shipping without PSRAM and 2,60 with psram.
Here, you are mostly paying for the smartwatch package, not the brain.