[arch-general] Configuring enabled services

[Gesh]

Dear all,
I've been rereading the old arguments on the rc.conf split.
Disregarding everything discussed there, one interesting
point came up during that discussion.[1]
Is it possible to have some configuration file, e.g.
/etc/systems/services.conf that would list all the units
one wants to be enabled at boot? This would both simplify
backups and reduce the magic of and dependence on systemctl.
Is there any reason this can't or shouldn't be done?
With best regards,
Gesh
[1] - http://permalink.gmane.org/gmane.linux.arch.general/43459