New system is a beast. Should serve you well.
I have decided to not upgrade any of the computers in the house until at least 2029. Late last year, I changed the CMOS batteries in every motherboard in the house, did a few small SSD upgrades (mainly for my wife's PC) - and however much money we have in the "PC" savings account in 2029 will be our budget.
I've got a system similar to your old one, though, a 5950x, 4090, 64GB of RAM, several m2 ssds. It runs everything I throw at it (including local LLMs/ local image gen) - and given I have such an enormous backlog of games, I have enough to keep myself content.
My wife's computer on the other hand may need an upgrade sooner. 10th gen Intel and a 3080, but also with 64GB of RAM.She is dual booting windows and Bazzite, because she needs Windows for work, but she now hates Windows for gaming, and I'm so proud.
I'm still running both, too - but after about 12 months on Mint / Endeavour OS / Bazzite, I think I'm ready (when some time allows) to try native Arch. My experiences on linux began some time in 2010 when I tried to install gentoo as a highschooler, and regretted everything.
It is so much easier now, and so much more accessible.