Clipboard is consistently broken on Wayland. I don't use any XWayland application, it's all native Wayland. Sometimes when I copy things they don't paste, and I need to switch back to the original window for the copy to register. Or even copy again to be sure. This was never, ever a problem in more than 10 years using X11.
But, fractional scaling is working like a charm on Gnome + Wayland (after a gsettings command). Very crisp, despite people saying it doesn't work. On X11, even on KDE, I can't get fractional scaling this crisp. This is the only reason I'm using Wayland; all the rest sucks.
But, the problem is, GTK doesn't support fractional caling natively. Even GTK 4 supports only integer scaling. So for fractional scaling the compositor has to scale up, then down. This approach generally causes blurring (though I don't know why Gnome on Wayland here isn't blurred).
When I see screenshots of people with fractional scaling on Gnome, it appears very blurry. Comparing side by side, here it isn't. I don't know why and at this point I'm afraid of messing it with and ruining everything.