We are aware of the criticisms of GOTO, which, given a superficial understanding of the anchor tag in HTML, the programming language, may come to mind for some programmers (mainly juniors). A full response to this criticism is beyond the scope of this document, but, in summary: you are wrong

You still need to read the variable in each iteration, but the cost of that is probably negligible

You can disable the facial recognition, so that shouldn’t be an issue

There’s also the Ox64, it’s a neat little device but software support is not great

All you’d need to program that ESP32 is an USB to UART adapter, you can get those for pennies on the dollar. I’ve never used Ethernet on the ESP32 so I can’t attest to how easy it would be, however I do know that doing it over WiFi is super simple.

Probably cheaper to just use an ESP8266 or the like

You can