Ignoring current gen stuff, it completely changed the experience of last gen games for me, too.

I like games at a difficulty level that's fair, but punishing. If I make the same mistake 20 times in a row, I want it to get me killed 20 times. There are plenty of games that do this reasonably well, but on PS4, those deaths might take 5 minutes to load back into. On PS5, it doesn't. There were several games where I wasn't willing to spend an hour to play 10 minutes because they were on a particularly challenging encounter, but were great experiences with the better loads on PS5.

The triggers are also amazing, especially in combination with the high fidelity vibration. They add a lot of feedback in games that utilize them well, in a way that allows for much tighter precision of controls with a smoother learning curve.