I have an Alienware AW3423DWF since about a year now with about 4000 hours on it. Very happy with it, won’t be going back to anything else until another technology with per-pixel lighting comes along. I also have a Dell with VA panel as second monitor and it looks like 90s technology compared to the OLED panel.
The only bad thing I can say about the monitor or OLED in general is that the dimming is fairly aggressive, i.e. on bright scenes you will not even get close to the advertised brightness. Makes the OLED monitors pretty much unusable in HDR for desktop usage. Mostly unnoticable in gaming and movies.
There also is some text fuzzing with high contrast text, not distracting for me but might be for others.
but how is the current compatability with Linux these days?
No issues here on Linux. With Plasma 6 you can even do HDR properly. Many games work with the latest Proton-TKG on Wayland and the HDR layer, some still need gamescope to properly work. mpv does movies/shows in HDR with the HDR layer, no issues.
Always check out rtings.com for their monitor ratings, they do the most thorough tests of all: