Maybe in the AI Twittersphere it started with sama, but it’s been becoming common in Gen Z culture for a few years now. If you look up popular bands at the moment, you’ll find a decent chunk of them only use lowercase in their band and song names.
I’m in gen z and usually type in all lowercase on my phone because I have autocorrect turned off and capitalizing the letters would be more work. Generally though, the aesthetic has become more associated with girls, I suspect because of women popular among girls being early to/pioneering the trend (namely Emma Chamberlain’s all lowercase youtube video titles and Rupi Kaur’s poetry books being entirely lowercase)
The phone only auto capitalizes the first letter of a sentence. If you end up changing it sometimes it doesn't get replaced with a capital. If you get frustrated with autocorrect features, often modern phones don't allow you to select which features to turn off and you're forced to turn everything off, at least that's how it was during the time i learned to type with the phone. I'm not gen z but I'd say it has a lot to do with it being much more cumbersome to capitalize a letter on the phone than the keyboard.
Plus, there's also the aesthetic, for a while we did it out of angst and to show we weren't all that wrapped up in the modern sensibilities. It seems like the situation as society moved forward may have only gotten worse for this.
If you're confused about something gen z does, it's either:
1) they're teenagers and grew up with phones, get with the times old man
2) a large corporation that didn't have a monolopy on communication (maybe basically everything else too) when you grew up now does and its an artifact of being forced to grow in that world
3) global warming is scary as shit, no one in power seems to give a shit, economies are crumbling, we're temporarily losing the worldwide battle for continued democracy, why wont they stop the war, school shootings, nuclear destruction isn't too close but doesn't look like it's getting farther away, etc etc etc. Basically, "have you seen the world? Why are you even trying, let alone the teenagers today?" type thing.
You can disable the option on phones to auto capitalize.
Again, my observation here is not that "TVs should stay grayscale" but that this lowercase movement is now being used to "fight the AI generated content" which I find pretty funny because it makes no sense. You can tell ChatGPT to write in lowercase.
It especially got traction after @sama's tweet that had no intention to associate it with non-GPT content, but just weirdly flexed that he types in lowercase.
j/k but finding it pretty funny these days that more and more people are switching to lowercase, assuming it started from this @sama tweet: https://twitter.com/sama/status/1735123080564167048