In current state Nvidia has no competition, and you buy AMD only because you hate Nvidia, not because it's better. I had tons of AMD cards my first being ATI 9000 but if you want to do more than game the hassle is not worth it. My last AMD was Radeon VII, once I got a bit serious into Blender there's just no comparison, even with enterprise drivers the crashes, random issues and slowness comparatively is just not worth it. What took me 3 minutes to render on Radeon VII takes 10s on 3090 Ti, StableDiffusion renders take 5-6s without any hassle playing with rocm, gaming is also no comparison with RTX (I don't even use DLSS). Fun fact I sold my RVII after 3 years and added $500 for a new 3090 Ti. Nvidia sux for their business practices but technically they dominate because they invested in software really early on and established themselves with Cuda, OptiX, RTX, DLSS. Older AMD cards are nice for hackintosh if you're into that though, Apple dropped Nvidia hard. Also the Linux driver blob thing if you want to be a purist, but IIRC it's supposedly changing (sorry don't have a source right now).