How is this different from Wokwi.com? They’ve been doing for years, and have a large number of microcontrollers emulated.

I will push back against this broad class of question (critisism?), as it could be applied to the large majority of creations people making, exluding a minority of truly novel things, and outright clones.

For a relevant example, look at Show HN: You could make this same post with a slight variation on every one of them.

OSS and the price? It may be vibe coded but the price is free.

This one is vibecoded

Clickable link: https://wokwi.com/