My phone auto-corrects a small "i". I'm not a techie, but I would think that the newer smart phones do.
Phones might but computers don't.
I tried to type a few sentences and not capitalize the i and it feels odd.
No offense but how old are you? I'm 35 and it feels weird to me too but my cousins and siblings in their early twenties are a completely different generation using their computers and phone.
It's not Casey... she's spending her time on the beach, thinking up ways to spend her future fortune, bugging the crap out of her "handlers". There is no way in heck that she is on Twitter... let alone identifying herself.