[arch-general] systemd new dependencies impede using OpenRC

[Sebastiaan Lokhorst]

It is very simple. The bare minimum Arch install consist of the base
<https://www.archlinux.org/groups/x86_64/base/> group.

The user *must* install this group. If they don't, they no longer have a
minimal Arch install, so developers cannot help them. It is the *base* and
everything else builds on it.
It would make no sense to replace the *linux*, *filesystem* or *pacman*
package with something incompatible and expect everything to keep working.

Now, it would be technically possible to replace *systemd* in base with a
generic "init-system" which could be provided by both *systemd* and *openrc*,
but that would make things much more complicated and *much* more effort to
maintain.

Regards,
Sebastiaan