I would be very happy, if it meant that this fastfetch-greeting no longer filled up the console.
Because the solution offered here Fish Shell: Automatic Fastfetch Removal might be overwritten again during a system update and you have to repeat the process…
Yes, unfortunately. I am still using X11 and hope, that it will continue for a long time, as Wayland has too many errors for me, e.g. (everything under KDE Plasma):
- Animated program icons dance around when starting a program (e.g. gnome-disk-utility) for a few seconds after the program has started - very irritating!
- Energy settings: the screen switches off after 5 minutes when a video is running, but it should only do this when there is no activity, i.e. the running video is simply not recognized as activity. Sure, I could disable the screen timer completely, but that’s not the point.
- Sooner or later the system crashes completely when you click on the OpenOffice icon, that is pinned to the controlpanel.
- Window rules do not work as well (or sometimes not at all, depending on the program) as with X11.
- Icons in the system section of the panel are sometimes not displayed, e.g. the Veracrypt icon.
On the other hand, I see no advantages for me at all with Wayland. It may be interesting for gamers or something. Apparently it is also more resource-efficient. I can’t really judge that, but I haven’t noticed X11 being a resource hog so far.
And the things mentioned above simply work under X11!
Yes, I had already found out about python-pyqt5 and installed it. And I think python-capng is automatically installed as a dependency with firewalld.
The question would be whether it couldn’t or should be pre-installed anyway (even though ufw is pre-installed now)?
Or let me put it another way: If I install firewalld on Manjaro, it works straight away, even with firewall-applet. I don’t have to spend a lot of time looking for why, what, how…
And the same applies to the problem “Plasma 6 - font issue in qt5 apps”:
Here How to set Qt5 font size - #5 by medin - Help - KDE Discuss, for example, it says that it is up to the distribution to provide the required packages
kwayland5
plasma5-integration
breeze5
oxygen5
The KDE developer nicolasfeller says:
Plasma/Plasma 6.0 Release notes - KDE Community Wiki clearly states that a Qt5 build of plasma-integration is needed. If your distro does not provide that by default you need to get in contact with them
My distribution is CachyOS, so I thought I had to write this here. With Archlinux, they don’t even let me into the forum (because even before you open an account, you are clearly informed, that only “pure” Arch users who have set up their Arch themselves are welcome there)! 
Ah, that’s good to know, because it looks like I’ll be sticking with VirtualBox for now, whether I like it or not. I tried Virt-Manager/Qemu/KVM the other day, but it wasn’t possible for the guest to connect to the Internet! I spent days working on it, the NAT adapter was also active and seemed to be working, but it just wouldn’t work… I eventually gave up in frustration!
But that’s too off-topic here.