> I noticed Slack was incredibly fuzzy…. it doesn’t use Wayland.

People should stop using that crappy Electron Apps, that does exactly the same thing that opening a webapp page on a tab of your browser. Seriously, you are wasting RAM and CPU (and battery) doing that. And this it's totally independent of you using Windows, OSX, Linux, BSD...

I use Slack and Discord from the web browser, and I don't have any issues. Also, I get fro free, better support of that webapps running in Wayland