>Lots of people here only know their weight in kg now (including me).

Is that with younger generations? Most people I know doesn't have clue about their weight in Kg.

Well I'm in my early thirties so I'll leave that up to you to decide if that puts me in the "younger generations" bucket

When my baby was born about a year ago here in UK I would always say his weight in kg when someone asked, and people would literally stare me blank in the face and say they have no idea if that's a lot or not. Once I converted it to pounds for them they were like "oh yeah, he's a big baby then".