FWIW I recently switched full time to Linux and have had absolutely 0 problems with GNOME, Wayland and Fedora, though I am using an AMD GPU. wl-copy works fine, askpass works, copy and paste works, screen sharing with Google Meet works, drag and drop works. Using an iphone as a webcam works as does recording my screen. Most importantly using multiple monitors with fractional scaling works perfectly. AFIAK this is not…
But, I think the article has some valid points about how long it's taken to get even this far. And it just kinda sucks that some things are still broken or don't have alternatives (the #1 thing I miss right now is Barrier (Synergy) for using my macbook from my linux desktop). HDR gaming on linux is possible thanks to Valve but it's still nowhere near as simple as plugging in your HDR display and toggling one switch.
And it's been rough getting here, and it seems like there are still some things that are slow and hard to get right. I'm not a display protocol dev, so I don't really have educated opinions about the protocol. But I know it's been a rough transition relative to other projects I've adopted even when there was major pushback (systemd springs to mind).