Mixed dpi works fine under X and tearing is trivial to avoid.
Meanwhile under every other Wayland compositor other than KDE apps using XWayland are at best an unusable blurry mess.
Kde alone actually handles high and low dpi monitors plus xwayland acceptably and at least under void it's Wayland session is buggy affair still.
As far as sway in addition to being useless for mixed DPI plus XWayland it silently fails to start with Nvidia hardware unless you pass special arguments and modify the kernel command line which just looks to normal people like totally broken. We are talking about the party with >80% of the discrete GPU market.
Then there is zoom screen sharing the fix to make it work with Wayland theoretically came out 4 days ago and is probably still a crap experience.
You will probably suggest getting rid of all XWayland using apps,Nvidia, and zoom but this isn't how people actually use platforms.
If something is supported and available it becomes part of people's expected workflow and people who get a frozen back screen don't throw away their workflow,convince their employers to drop zoom, or go shopping for a GPU they don't use the thing that makes their screen turn black.
Zero fucks are given regarding whose job it is to fix it or whose "fault" it is because nobody cares about plumbing they care about apps and hardware support.
The alternative is like picking an author based on his choice of word processor instead of his work.
People have been calling criticism of Wayland FUD for a decade. For most of that period the actual experience using existing hardware and apps has been pretty bad. The gap between proponents vision and users actual experience is especially large when user uses old stable software and proponents use very recent versions.
This means proponents have taught users they are full of shit and Wayland sucks. This will persist even when all issues are well addressed on versions of software actually used by the majority of people.