That must've been quite some time ago. With multiple areas with >50% migrants you can count yourself lucky if ppl even speak German fluently enough to hold a c

That must've been quite some time ago. With multiple areas with >50% migrants you can count yourself lucky if ppl even speak German fluently enough to hold a conversation. And the last holdouts that are still mostly natives are usually in the countryside... And the du/Sie rule has always been an urban convention. Personally, I think your friend just noticed the phrasing and made an issue out of nothing