Oh I've done it before and yeha I was being glib. I'm cringe too and have also gone through phases. My anecdotal experience though is that I kinda had myself figured out at 13, when I thought my gender and sexuality were different than everyone else and also I really like hardcore punk music/fashion, and that I wanna be vegan.

Then I spent a long time trying to stop being those things because I thought they were just cringe things from my youth that I needed to grow past. So I adopted a bunch of fake surface identities and tried to compensate for their fakeness by overdoing it. Now I'm well into middle age and I'm very confidently a nonbinary asexual vegan who dresses in chains and black eyeliner and I've never been more chill with myself. My original read on myself at 13 was correct and the actual immature thing I was doing was trying to be someone else.

I know that's not everyone's experience, but that's been the experience of a lot of people I've known who go through the cycles of adopting personas suddenly. I guess what I'm not judging is changing interests, or having a niche identity, or even when it's done by guys. But I do kinda get wary of people who very suddenly shift themselves in a way they think will be interesting, when really they're just adopting a persona for the sake of it. I've also known people who converted to religions out of nowhere and then didn't actually do stuff like read the Torah/Bible/Quran but would try to speak authoritatively on religious matters as if they were an insider. I don't like that kinda thing, when people try to confidently claim something that's actually very superficial and they just started last week.

Stuff like coming out as trans though I'd consider different, because that's still often not a safe thing to do. Like I came out as asexual to family and even that didn't go well, even though being asexual doesn't have nearly the same level of persecution or threat as other identities. So something like that is usually gonna have to be sudden because you gotta find a safe moment, safe person to come out to.