Comment # 1 on bug 1162427 from Dominique Leuenberger

Tumbleweed is a rolling release and it is thus natural that all updates are
usually coming from the main repositories.

But there are always exceptions when stuff needs to reach users quicker than
the formal staging/QA/prodbuild/fullQA cycle would take. For this reason there
is the update channel.

Removing it from a default install would mean to lose the ability git express
sec fixes (or pushing fixes while larger issues in the regular prod channel are
being worked out)