Composting is nice if there is a dedicated collection of it (like in some part of Italy) and if it is actually used (eg. not landfill/burned anyway).

Doing compost at home for yourself is not working in general because most people live in an apartment: - People won't know what to do with it and will throw it away. - A large amount of moisty stuff in a small room with bad ventilation.

That's my experience of seeing city people doing it.