the good thing is that virtually everyone uses GNOME and KDE, so the small issues are mostly encountered by more advanced users with custom setups. The main point is that app developers can now develop apps that will work anywhere that implements the required features, and if it doesnt, then too bad, show an error message. Its the same kind of problem with, for example, webcams. The user may or may not have a webcam connected, in which case you display an error popup with a clear message that it does not work because the feature is not implemented. They could go into fallbacks but those are usually platform/desktop specific (which goes against the point of building using the standard stack)
the good thing is that virtually everyone uses GNOME and KDE, so the small issues are mostly encountered by more advanced users with custom setups. The main point is that app developers can now develop apps that will work anywhere that implements the required features, and if it doesnt, then too bad, show an error message. Its the same kind of problem with, for example, webcams. The user may or may not have a webcam connected, in which case you display an error popup with a clear message that it does not work because the feature is not implemented. They could go into fallbacks but those are usually platform/desktop specific (which goes against the point of building using the standard stack)