E.g. crypto displayed many, many characteristics of a bubble for a number of years, but the crypto bubble seems like it has just slowly stopped growing and slowly stopped getting larger, rather than popping in a fantastical way. (Not to say it still can’t, of course)
Then again, this bubble is different in that it has engulfed the entire US economy (including public companies, which is the scary part since the damage potential isn’t limited to private investors). If there’s even a 10% chance of it popping, that’s incredibly frightening.