Arch Linux now compiles Qt from KDEs fork[1]
The only ray of sunshine here is that, with Qt 5.15 being the last 5.x release, we may eventually see all distros shipping it instead of the horrible version fragmentation you see now (Ubuntu 20.04 LTS and CentOS Stream are still on 5.12, Debian 10 is on 5.11, RHEL 7 is on 5.9).
The rift being created between Qt 5 and Qt 6, and the lack of any stability for FOSS with respect to upstream support for Qt 6, means we will likely see lots more fragmentation on the KDE/Qt side in years to come.
Qt 5 will eventually end up like Qt 4, which has been dropped from Archs main repos[2], despite having over 500 packages in AUR depending on it[3].
Of course, depending on a single fork likely won't work either. The KDE fork is going to be naturally Linux focused, and probably won't care to tend to any Windows or macOS that arise.
GTK+ on other platforms sucks, but at least on FOSS platforms it's not a mess.
[0] https://www.theregister.com/2021/01/05/qt_lts_goes_commercia...
[1] https://github.com/archlinux/svntogit-packages/blob/packages...
[2] https://lists.archlinux.org/pipermail/arch-dev-public/2019-A...
Too many people expect to be paid for their work, while not giving anything to upstream only entitlement of what should be provided as free beer.
For those there is GPL license for Qt.
If you develop a QML app and want it to compile and run properly on all distros out there you need to code use a very low common denominator version of Qt and the associated QML components (versioning for which is only checked at runtime).
Have been using desktop Linux for almost 2 decades, My last 2 workplaces have been Linux desktop centric. Helped deploy quite a few Linux workstations.
I don't know many people that use Gnome.
Most use either KDE or some tiling WM (or some custom fork of Gnome2/3 that looks nothing like default gnome).
When Ubuntu dropped unity, some people went to gnome, some stayed but at least in my circles most bounced off.
On the cloud deployments it doesn't matter as they are accessible via ssh and cloud shells, and X Windows servers can be mapped to single windows.
Most of the people that I know that use Linux desktop are developers, and they generally don't use Gnome.
On servers sure its RedHat or CentOs or Ubuntu/Debian
But desktops are Ubuntu variants, then Fedora. Don't know anyone that uses RH or CenOS desktops.