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by vertex-four 3462 days ago
The point is that you wouldn't be able to enter a chatroom at a higher version than your server+client supports - how would the old code be able to understand it, after all? You'd be in pre-upgrade chatrooms, which would display the banner for everyone until relevant people upgrade/get kicked, and you could possibly start new chats with people, which would display the banner for all participants, but if you were on version 5 and #megolm:matrix.org was on version 6, you just couldn't join it until you upgraded.