My reason for switching from i3 to sway (about 8 years ago) is DPI support. High DPI is a pain in Xorg, and essentially impossible with heterogeneous monitors.
The migration was a one way thing. Lots of things are smoother and simpler, and not having to ever again touch Xorg.conf has improved my quality of life.
To this day, I still have different monitors with different scale factors.
> not having to ever again touch Xorg.conf has improved my quality of life
I haven't touched xorg.conf in decades. I suppose you might have to do it to configure some unique setup, but for me this hasn't been an issue in a long time.
Now with Wayland, instead of having to touch a single config file, we have to learn how each compositor/WM is configured, and do it there instead. It hardly seems like an improvement in that regard, IMO.