My work uses slack. The screenshare doesn't work with Wayland. Steam link/remote play doesn't work with a Wayland host (at least it hasn't every time i have tried it). For my gaming pc i only switch to X when i want to use the steam link and use Wayland the other 99.99% of the time because in general it is better. For work i exclusively run X. I started with Wayland, but then there were several occasions where i had to logout then login again switching to X just so i could share my screen which was a massive pain. I love Wayland, but i can totally understand people not wanting to switch until the tools they are used to (or are required to use) work properly under Wayland.