You're not a fanboy of anything, I think you just bought what worked best for you at the time, and you should apply the same principal now. Yes nvidia do nvidia things, but if they're the only company fulfilling your requirements (and if you're in need of an upgrade right now), you shouldn't limit them from your buying decisions. You may find a decent deal on last gen AMD and Nvidia GPUs.
RNDA4 will be available 'early march'. There's no solid confirmation on pricing save for what Frank blurted out on twitter that ~$900 was never part of the originally intended price range.
Back to you, do you have any specific requirements for the GPU outside of gaming (Gfx accelerated productivity and such)? Are you planning on using this with Windows or Linux (or both?)