It bothers me a tiny bit that 'sth' is a thing, because it seems so unnecessary to me (outside of perhaps T9 style texting?). I imagine it generates more confus

It bothers me a tiny bit that 'sth' is a thing, because it seems so unnecessary to me (outside of perhaps T9 style texting?). I imagine it generates more confusion than it saves effort, considering the word's relative (in)frequency. But I am also fascinated that this a apparently a thing :).