I mean in the sense of ‘the network will refuse upgrade’. Which makes the network sound like some kind of artificial intelligence, which first evaluates upgrades. When actually, it it probably means something more along the lines of an update takes effected once adoption is high enough. As you don’t collect statistics in the network, you wouldn’t know that it’s been adopted. If a bug occurred after two updates, with the bug in update one, but wasn’t detected because of low adoption, it makes tracking issues very difficult.