Of course they can, but if you use official repositories and your own
repositories, outages of the former don't affect you much because of mirrors,
and outages of the latter you control.
It just happens that I almost never see people keeping their own replicas of
RVM and gems repositories.
Edit: I only now realized I've omitted important part in my first comment:
non-official Yum/APT repositories I use are my (my team's) own.
It just happens that I almost never see people keeping their own replicas of RVM and gems repositories.
Edit: I only now realized I've omitted important part in my first comment: non-official Yum/APT repositories I use are my (my team's) own.