I'm still perfectly fine in my 6+ years old Gaming PC with 16GB.

But then again I switched from Windows to Linux about 2 years ago.

Since the time I started using PCs (over 3 decades ago), I went down the route of squeezing as much as I could from my desktop PCs by upgrading the hardware piece by piece rather than periodically buying a new one - to the point that I think I've done maybe just 3 full replacements in those 3 decades - the upgrades most of the time being memory, graphics cards and storage upgrades as those tend to be the best bang for the buck, though a few times all the way to replacing the motherboard (which sometimes forces things like memory upgrades and once even a computer box and power source upgrade, in the transition to ATX physical format).

All this to say that in the last few years since Windows has become so bloated and inneficient, Linux's capabilities to run Windows software have become so good and the prices of the usually best value hardware upgrades (memory, graphics cards) have become so high that, in my (I believe informed) view, the best performance upgrade for one's PC right now for most people is literally to replace Windows with Linux.

This isn't fanboyism speaking - I've been using Linux for fun since the early 90s when I would install Slackware from floppy disks, professionally for a large part of my career (which was developing software for the server side, were Linux became dominant in the 00s) and only switched my Gaming PC to it 2 years ago because I before I didn't feel it wasn't at all hassle free to game in Linux and I didn't want to come how to unwind from spending all day programming and doing bug-fixing just to be stuck at diagnosing problems running some game or other in Linux - this is genuinelly my analysis based on my experience of improving my PC almost always by targetted upgrading piece by piece to improve performance rather than regularly buying new machines.

In fact, I've done this upgrade not just for myself but also for a family member whose Windows 8 (!) PC had become incompatible with pretty much everything the used - put Linux in, put up the desktop shortcuts for them to get to what they use (browser, e-mail), configure the thing to auto-update and it's problem solved.