For me, I honestly just think it's getting old/stressed. I'm not concentrating direly on every email I send or comment I make, not like I could when I was younger. Often I'm flipping through three other programs, looking up some information or answering a question in a chat window and I just... don't have the ability to eagle eye every word anymore.

I don't mind internet intentional misspellings and stuff, and I guess I don't really get annoyed by it anymore because it's come up in a few arenas now that the requirement for specific grammar is very classist and probably racist, and I go... hm. I think I agree at this point, though I would have a hard time articulating why.

Though now that I think about it - so much more of my communication is text-based. So that's just an increase in spontaneous (non-edited) text, so... yeah. That's definitely a factor here too.