I went from a 2080 Ti to a 5070 Ti. Yes it's faster, but for the games I play, not dramatically so. Certainly not what I'm used to doing such a generational leap. The 5070 Ti is noticeably faster at local LLMs, and has a bit more memory which is nice.
I went with the 5070 Ti since the 5080 didn't seem like a real step up, and the 5090 was just too expensive and wasn't in stock for ages.
If I had a bit more patience, I would have waited till the next node refresh, or for the 5090. I don't think any of the other current 50-series cards are worth besides the 5090 it if you're coming from a 2080. And by worth it I mean will give you a big boost in performance.
I went from a 3070 to 5070 Ti and it's fantastic. Just finished Cyberpunk Max'd out at 4k with DLSS balanced, 2x frame gen, and reflex 2. Amazing experience.