Not yet. Biggest dealbreaker for me is screen sharing not working in Slack, which I need for work. Once that’s no longer an issue I will be more inclined to make the move. Given that plasma is becoming the default choice for distros, I hope Slack devs will make this a priority.
What I look forward the most with Wayland is actual support for fractional scaling. I think fractional scaling is required for a pleasant experience when using high dpi monitors, but Slack screen sharing has higher priority for me.