My pc is now 4 years old. While I would love to go through the process of building a new rig, there is absolutely no reason to. I'm on a 12 core ryzen 9 5900x, have gen 4 nvme storage, have a gtx 3080 video card, 64gb of ram, 2.5Gbps networking and my box is running fantastic. Technology just isn't evolving fast enough for me to even consider a new build.
I have purchased a beelink mini pc about 3 years ago. It was only like $500 and was a little toy that i could experiment on without ever having to worry about screwing up my actual rig. It's running 11 and it's been fantastic. And I also bought an m1 based mac mini too around $500 just to have a new mac. (Actually considering trading it on on a new m4 mac mini as apple will give me $300 trade in on it, so that would cost me less than $300 to make the leap).
So with all 3 of those machines I'm just in a good place and see no reason to build a new desktop pc anytime soon.