I’m also using Plasma 5 on my Surface Laptop Studio! Wayland brought a lot of touch advances, but unfortunately the onscreen keyboard still does not work with every application.

Personally, I think KDE Plasma is great for convertibles/touchscreen laptops, but still has a ways to go before I’m comfortable using it with touch on the Surface. Windows 11 is still the best “touch-optimized desktop environment” I’ve used, unfortunately, but I’m expecting good things as more apps are ported to Wayland!