I disagree. GNOME is a bit buggy, but plasma is not designed for touch, and I think that matters a lot. Steam deck also has touchpads that most users use when mousing about their regular de, the steam decks touch support is mainly meant for the steam bigscreen ui.
Maybe I’m a dumbass and it’s my fault, but I find that archinstall always has an issue when you run it. It’s easier to install arch manually than run the and troubleshoot.