What assets you’re recycling is a huge factor. There are crates in Fallout 4 that were originally made for Oblivion. You almost certainly won’t notice unless you’re looking for it. Similarly, I’m playing Divinity Original Sin 2 and there are a bunch of little things that were reused for Baldur’s Gate 3, like vases. Again, most people will probably never notice.

On the other hand, BioWare reusing animations that were originally created for Neverwinter Nights in Mass Effect 3 is jarring, even though those animations generally worked fine in KOTOR. Or Assassin’s Creed 3 using combat animations in the modern day segments that were designed for the flintlock-wielding enemies in the historic segments.