A lot of games did this.
Like each Final Fantasy game on the PS2 is a new engine. Each Resident Evil.
There was Renderware I guess to share liek Unreal. But that's it.
Not like these new game devs. I can really tell these new games are so unoptimized.
I mean look at this. Is this progress?? Not really. And 2024 has just waaaaay worse performance. https://www.youtube.com/watch?v=E5fr1R8kZzI