Does not have to support the runtime installation of kernel modules. This will prevent the out-of-the-box installation of, for example:
Proprietary NVIDIA kernel driver (NVIDIA GPUs must either be new enough to use the open-source kernel modules that can be distributed in-tree, or else use Nouveau)
VirtualBox (requires out-of-tree modules; QEMU/KVM probably do a better job anyway)
Vendor-specific VPNs that require custom out-of-tree kernel modules that cannot be redistributed with the kernel due to license incompatibility
Does not have to support the use case of developing low-level system components like the kernel, drivers, systemd, etc., as this can be troublesome with an immutable base OS.
Does this part mean there will also be no support for ZFS?
Debain/Ubuntu are always a little behind on library and Qt versions etc. For example with KDE Neon on an LTS they had to overlay/patch many libraries which ended up breaking most of the Qt applications that users could install from the Ubuntu repo. Arch is almost always up to date with the latest stable releases of libraries and Qt making it an ideal base for KDE Plasma which is a fast moving desktop.
For whatever it's worth, I use (up until fairly recently) KDE Plasma on Arch, and it's pretty much fine. There's some hiccups especially after a big update such as KDE Plasma 6, but it's a smooth ride so far.
If the KDE Plasma developers support an Arch-based distro of their own, and package stuff for this distro with care, I think it'd be a better experience, but I am guessing not by much compared to KDE Plasma on base Arch.
although this is cool, i'm a little on the fence, as i'm still not sure if it's the job of application/desktop developers to create an os.
also, last i heard, nouveau doesn't get commits for about a year now. support is pretty hit or miss. my graphics card is one of the best supported by nouveau and it works pretty well but it will freeze at least once a day, which is why i had to stick to the proprietary driver
I think dropping loadable module support would severely limit what users can do when a driver misbehaves or doesn't handle a particular device as well as an (in-tree) alternative.
Also, I wonder how they expect to achieve being "The KDE operating system" or "doesn't break" when their existing distro has been more than a little rocky so far. Who do they think will do the long-term work of raising and maintaining the quality bar?
It would be kool to have a solid reference distro where Plasma could shine, especially for organisations and newer users who don't know how to replace GNOME on existing distros. But this proposal gives me the impression that they underestimate the effort required, so I am skeptical.
The existing distro Neon has issues generally because of their choice to use Ubuntu LTS as a base. This is because KDE Plasma needs newer libraries usually than Ubuntu LTS can provide so they add newer libraries in their repository which often breaks existing apps in the Ubuntu repository. Having to patch and bring newer libraries all the time takes its toll. Basing it on Arch means they'll almost always have the latest libraries ready to go.
The existing distro Neon has issues generally because of their choice to use Ubuntu LTS as a base. This is because KDE Plasma needs newer libraries usually than Ubuntu LTS can provide
In other words, they don't have enough resources dedicated to doing it well. This is part of the problem I described.
Basing it on Arch means they’ll almost always have the latest libraries ready to go.
That could reduce the work required in one area, but would increase it in another. Arch fails the "doesn't break" goal on its own, which means someone would have to do more work if they want to achieve it.