How is this different from Wokwi.com? They’ve been doing for years, and have a large number of microcontrollers emulated.
For a relevant example, look at Show HN: You could make this same post with a slight variation on every one of them.
In 2027, I can assure you I won't be shopping around for existing projects very often.
For starters, I don't need them. Second, it might take me longer to learn theirs than to build my own. And last, the amount of slop getting pushed out is going through the roof, making discoverability a difficult problem already.