I just finally upgraded from a 1080 Ti to a 5070 Ti. At high refresh-rate 1440p the 1080 Ti was definitely showing its age and certain games would crash (even with no GPU overclock). Fortunately I was able to get a PNY 5070 Ti for only ~$60 over MSRP at the local Microcenter.

5000 series is a pretty shitty value across the board, but I got a new job (and pay increase) and so it was the right time for me to upgrade after 8 years.