Furthermore, all of these options can be enabled individually on multiple screens on the same system and still offer a good mix-used environment. As someone who has been using HiDPI displays on Linux for the past 7 years, wayland was such a game changer for how my system works.
Libreoffice includes support for gtk3, gtk4, Qt6, and other backends: https://github.com/LibreOffice/core/blob/master/vcl/README.m...
Maybe you need to try wayland with an alternative backend?
And this is the inherent problem with Wayland. Now we have to deal with a combinatorial explosion of things to try to get something that "just works."
People keep pushing KDE+Wayland to beginners either through recommendations or preconfigured stuff like bazzite. My experience is that the defaults in such a setup are broken and frustrating.
VRR works on X11 without manual configuration.
Fractional scaling can be implemented in the compositor or applications.