Multiple external displays works MILES better on wayland - I can set proper scaling ratios set on each screen, which is basically a requirement for a modern laptop with external monitors. No more "This window opened on my laptop screen and will be HUGE on the external monitors because the laptop was scaled for hidpi and the externals aren't". Now the issue is just limited to apps running in x-wayland, and I have close to zero apps that I care about running in x-wayland these days.
Further - I get much more consistent external display output with Wayland. I plug the monitor in and it "just fucking works"tm.
Screen sharing is a pain on basically every modern system - you're letting one application monitor and consume the output on another. Allowing this by default and with no user prompt is a fucking nightmare (and as much as people bitch about "but mah screen sharing!" - there's an equally vocal push from the "but mah system security!" crowd). Wayland struggled here for a bit, but it seems like covid finally pushed the right buttons to get this knocked out in most of the DEs I've used. All the major sharing platforms now seem to work - Slack/Discord/Zoom/Chrome/etc... Including sharing multiple displays now.
So basically - fucking no one thinks this: "But if Wayland folks think that having two external displays and screen sharing is an esoteric workflow"
that one works better with wayland than with x11. Especially if the monitors are different dpi.
For what it worth, Wayland has really good externel screen support (mixed-DPI even), so it is likely just a not-yet-supported feature, nothing inherently problematic.
But if Wayland folks think that having two external displays and screen sharing is an esoteric workflow, I know that my decision was correct.