For people wanting the old-fashioned fast and simple GUI experience, I recommend LXQt.
So basically, no use when you've not tasted 120+Hz displays. And don't because once you do, you won't go back.
But for gaming, it really is hard to go back to 60.
Incredibly, Linux has better support than windows for it on the desktop: DWM runs full blast, while sway supports VRR on the desktop. Windows will only enable it for games (and games that support it). Disclaimer: Wayland compositor required.
It’s not enabled by default on e.g. sway because on some GPU and monitor combos, it can make the display flicker. But if you can, give it a try!
But it has been a while since I've tried it, maybe I should look into it again
The state of Wayland compositors move fast, so support may be here. Last thing I’m waiting for is sway 1.12 that will bring HDR.
* The minimum variable refresh rate my display (LG C4) supports is 40 Hz.
On a CRT monitor the difference between running at 60 Hz and even a just slightly better 72 Hz was night and day. Unbearable flickening vs a much better experience. I remember having some little utility for Windows that'd allow the display rate to be 75 (not 72 but 75). Under Linux I was writing modelines myself (these were the days!) to have the refresh rate and screen size (in pixels) I liked: I was running "weird" resolutions like 832x604 @ 75 Hz instead of 800x600 @ 60 Hz, just to gain a little bit more screen real estate and better refresh rate.
Now since monitors started using flat panels: I sure as heck have no idea if 60 fps vs 120 fps or whatever change anything for a "desktop" usage. I don't think the problem of the image fading too quickly at 60 Hz that CRT had is still present. But I'm not sure about it.