Incidentally, millenials also used the "no caps" style but mainly for "marginalia" (at most paragraph-length notes, observations), while for older generations it was almost always associated with a modernist aesthetic and thus appeared primarily in functional or environmental text (restaurant menus, signage, your business card, bloomingdales, etc.). It may be interesting to note that the inverse ALL CAPS style conveyed modernity in the last tech revolution (the evolution of the Microsoft logo, for example).
Surprisingly, I have seen lower case AI slop - like anything else, can be prompted and made to happen!
-- inspired by e.e. cummings!
I eventually ran into so much resistance and hate about it that I decided conforming to writing in a way that people aren't actively hostile to was a better approach to communicating my thoughts than getting hung up on an aesthetic choice.
Having started out as a counterculture type, that will always be in my blood, but I've relearned this lesson over and over again in many situations-- it's usually better to focus on clear communication and getting things done unless your non-standard format is a critical part of whatever message you're trying to send at the moment.
I (a millenial) carried over the no-caps style from IRC (where IME it was and remains nearly universal) to ICQ to $CURRENT_IM_NETWORK, so for me TFA reads like a chat log (except I guess for the period at the end of each paragraph, that shouldn’t be there). Funnily enough, people older than me who started IMing later than me don’t usually follow this style—I suspect automatic capitalization on mobile phones is to blame.