I'm weird, i even have disappearing messages for my coffee chats. It's kind of refreshing not having any history.

Not if you're using Signal for life-and-death secure messaging; in that scenario it's table stakes.

Strong and accurate. Considering non-disappearing messages the same as texts is not the same thing as saying all Signal messages ought to be disappearing or else the app is useless.

Telegram allows you to have distinct disappearing settings for each chat/group. Not sure how it works on Signal, but a solution like this could be possible.