I have been considering selling my 3060 ti and buying a 6700 xt for a while now. The main reasons are (potentially) switching to wayland, +4 gb of vram, hardware acceleration in firefox (and steam too, it’s leaking vram for me with nvidia), potentially vr on linux with my quest 2 (a lot of things in alvr seem to be locked for nvidia) and better compatibility with linux in general. I don’t really care for productivity or rtx and dlss (it’s not like they work in most games anyway). The upgrade would cost me at most $75.
I’ve been avoiding Nvidia for a while and I generally recommend it (at least for now). I wouldn’t say it’s mandatory though. Nvidia support has come a long way.
That being said, if you can snag a good used amd card to replace your 3060ti then why not if you’re not benefiting from the rtx features and you find your current vram is causing issues, then you do you.
You could also hold out a bit longer and see if the 6800xt becomes more affordable given the recent launch of the mid tier 7000series.