The case for uppercase
Kev Quirk in Use the Bloody Shift Key!:
Personally, I can’t abide it. When I come across one of these posts, even if the title sounds genuinely interesting, I just can’t bring myself to read the content. Instead, I end up focusing on the obvious lack of uppercase letters. I know I’m missing out on interesting posts because of this, and that makes me sad.
I share this pet peeve with Kev. When I see someone omitting uppercase letters from their writing, I simply move on. I know it's a stylistic choice and all, but I just nope out of there. First person I remember seeing doing this was Sam Altman. That alone should be reason enough to reconsider the practice for those who engage in it.