Thanks for this. I often see folks like OP very condescendingly tell people they're not writing "correctly", while forgetting that English is a constantly evolving language -- at a certain point if a "mistake" becomes mainstream, it becomes an acceptable one.

(I'm struggling for more complex examples, but think of how people will say, declare "that's not a word"... well, usage of "not a word"s is how they end up going into the dictionary...)