My opinion is that a lot of people gave the songs a fair chance when they found out they were at some point going to be used in Sonic 3. I say that because that's what I did. I'll be honest, when I first found out the Sonic 3 tracks were replaced in PC Collection, and the fandom routinely mocked them, I didn't really give them a fair listen. I didn't even listen to most of them the whole way through or pay them attention when I did listen to them out of curiosity's sake. When I found out about the prototype, I listened to the songs, very sceptically and even thinking they could be placeholders, but grew to accept that Carnival Night, Competition and Launch Base have incredible proto tracks. I like the others a lot too now. But I don't think I would ever have done so if I didn't know that the tracks were going to be in Genesis Sonic 3 at some point. And while I accept that some people may have approached the tracks differently in the Genesis soundfonts, I think the majority of people changed their stance simply because the songs have more legitimacy now. It's not that the songs have become good, but that we always took them for granted until now. There's hardly any remixes of the songs on Youtube even.