I used to "upgrade" iMacs each year, where I'd sell the previous years model and buy the newer version and usually only have to pay less than $1000 each year and in return I'd get the latest CPU, GPU, RAM, SSD, screen upgrades etc.
Upgrading my PC tends to be a domino effect where I'll want a new monitor so I go out and buy an LG OLED and suddenly find out that my 2080 doesn't support HDMI 2.1, so I guess I should buy a 3080 if I want 120hz, and now I see my CPU is bottlenecking it so I should probably pick up an Intel 12th gen, but now I need a new motherboard and RAM and cooler and hmm maybe my PSU isn't powerful enough.... and suddenly I've basically just built a brand new computer and selling the old PC parts is a nightmare compared to selling a used Mac.
That's not to say PCs aren't infinitely more upgradeable than Macs, but just that for more than adding more storage it's not always as plug and play or economical as it sounds.
Imma HUGE LG OLED fan like you. In fact, I’m jonesing for the new 42” C2 one to use as a monitor for when I get one of those new Apple Silicon Macs. The thing that’s been holding me back is the lack of HDMI 2.1 ports like you mentioned, so no VRR, yet.
However, I’ve never built my own PC (or Hackintosh, even, back when you could), so I’ve always been open to what BTO options have been available. I used to live on PC Part Picker back in the day, just to track prices. If you’re familiar with Boot Camp on the Mac side, you know that it lets you dual-boot between MacOS and Windows, just to play games that weren’t on the Mac, and I enjoyed that for a little over a year.
I wanted to kind of reinforce your points about how even PC gaming isn’t plug-and-play, and the domino effect can be an expensive and a head-scratching one.
The only plug-and-play gaming experience we have in our house is the PS5, even if I have to use a mouse and keyboard for shooter games.