Some of the problems are indeed due to the sheer difficulty to implement proper high DPI/mixed DPI support, but some mentioned in the GP are definitely inflicte

Some of the problems are indeed due to the sheer difficulty to implement proper high DPI/mixed DPI support, but some mentioned in the GP are definitely inflicted by the X11 protocol: >Spanning two monitors results in terrible scaling problems. >Apps that do account for it at start up won't account for it during reposition, so they look fine if they open on the right monitor and terrible if moved to the other. Especially the second point. Applications on Wayland simply get told what scale they should draw on. No need to determine whether they are on the right monitor or the other monitor, yada yada. For those problems, how can you say X11 is not bad, when clearly other protocols have shown the problem is solvable?