I have to accept I do this every console generation since the OG Xbox. I get the console, say "this is good enough for me, I'm never going back!" and then a few years later build a new PC anyway. But specifically this time the tipping point was basically the advent of VRR (and my experience of how great it is on console).
I've been dissatisfied with my GTX 1080 for quite a while because it can't run newer games even close to 60 most of the time, and 30 is less than ideal, and I can't stand the stutteriness of an unlocked framerate with vsync, nor can I stand tearing. Then I got my new TV which supports gsync, which would solve that issue, but it only has HDMI ports, no Displayport, and the 1080 only supports gsync over Displayport, and Displayport to HDMI adapters don't work with gsync. So I've had my eye out for a side-grade to an RTX 3060, which does support gsync over HDMI, but had kind of decided that was a waste of money and wasn't going to do it.
Fast forward a couple months, I get a raise at work that's retroactive to the start of the year, so I have a bunch of cash burning a hole in my checking account, and then on Friday I happen to stumble across an RTX 3060 Ti for only 25% over msrp (and by "stumble across" I mean "go to Newegg and run a search"), and ordered it. Then on Saturday I started thinking "the rest of my PC is almost 10 years old at this point, seems silly to just do the graphics card..." and here we are.
VRR should pretty much fix my tweaking issues with PC gaming too though, cause now I don't have to worry about optimizing with a locked framerate, one that fluctuates will be fine, so I won't get into that cycle where a frame drops so I go into the settings to try to fix it, I'll just let it run unlocked and as long as it doesn't get like sub 45 it won't bother me.
*Edit - it does kind of render my Series X superfluous though, not sure if I should try to sell that or what...