Yeah, I'd prefer something like:
All system services present after installation with one of the release-blocking package sets must not time out every time when they are being stopped during system reboot/shutdown.
It's possible but I find it too weak. See my reply to Ben, thanks.
I like the general proposal, just different wording seems better. If timeout doesn't happen regularly, I won't block on it.
"Every time" is different from "regularly".
Doesn't need to be. "Every time" implies "regularly", "regularly" can mean "every time".
I get your point, for the record, I am for blocking on this only if it happens every time.