[xtho]

> Rolling release means that you don't have to do distribution upgrades.

This goes beyond the OP's question. How does arch handle changes in essential components like the switch to upstart in ubuntu? Does this work well with rolling releases?

[w1ntermute]

I've been an Arch user for ~1 year (Gentoo before that), and "essential component" upgrades seem to take place just fine. For example, there was a recent shift from Python 2 to Python 3 as the primary Python interpreter, and there were no noticeable problems.