Hi, Sam, thanks for the video. First, I really wasn't aware that "What's up?" isn't a sort of synonym of "How are you?" Good to know. I do like your statement, "Grammar can only be right or wrong." Also, I am well aware that as natives of any language, we don't speak C2 during everyday conversations. Even if we are well-educated, we tend to simplify our language. Why? We don't like to sound too posh and "artificial". I know an anecdote from the communist time in Poland about a Polish professor of English literature who spoke in a very sophisticated way and his pronunciation was also queen-like (more than RP). When after many years of his university career, he got a chance to go to England (which wasn't so simple for us, living behind the Iron Curtain), people there just couldn't stand him! They thought he was such a snob! Soooo, perhaps it isn't that good to use all these super-advanced words and structures... About the vocab we learn at school, yes, you're right. We are taught too advanced vocabulary and don't know the most important basic words. For example, when my daughter went to France as an au pair, she didn't know the word "dummy" in French. And it was after she passed her matura exam in French with flying colours. So, is C2 level useful? Of course it is! There are always some user manuals to read ;)
