I don’t think unreal engine games play and look as well as custom engine games. Like doom or cyberpunk. If you open cyberpunk without rtx etc. It really really looks good and also plays very well.
Also there is obviously a massive gap between how games look and what the hardware is capable of. Cyberpunk runs better than total war attila on my computer as an example.
Don’t write a database, don’t write a compiler, don’t write an os, don’t write a game engine… are we all supposed to write web apps at this point?
This mindset didn’t create what we have today and won’t create what we will have tomorrow. I recommend people that like building these things to ignore this pov as much as possible
UE5 can make a great and efficient game actually - its more about how you use it. And because its huge and popular and accessible there are a ton of developers using it very inefficiently.
That can be true for any commodity software though. Designing something inhouse means you inherently will have engineers and experts with better low level understanding. It doesnt mean it will be better (could even be much worse) but theres a tradeoff there.