I don't think that has anything to do with rolling releases though, Rolling Release doesn't mean "ship whatever upstream has just released", but providing a constant stream of updated software. You don't have to ship anything that you deem good enough, and finding out what is and isn't is a matter of testing it with your usecases, or having a group of experienced users run it and report problems. It's certainly a bad idea to "blindly trust upstream, ship it and pray".
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