Language in the 21st century

I was brought up to always say ‘please’ and ‘thank you’. No-one says it any more. It’s not because they aren’t polite. It’s because they are too polite. No-one says ‘yes’ or ‘no’ either. The new lexicon of 21st century etiquette goes something like this: You’re a star = thank you (said to someone you know) Lovely = thank you (said to someone you don’t know) Absolutely = yes. Saying ‘no’? ... not answering an email, generally.