[sien]

It's a bit like obesity.

For most of human existence the ability to find sweet and fatty things and eat them as much as possible and put on as much weight as possible kept you alive. Now it hurts you.

Similarly with stuff for most of human history stuff was expensive, you kept every good thing you could possibly get. Then in the past 60+ years stuff has dropped in price amazingly and keeping everything is no longer a good tactic.

Space has become more expensive that stuff in places where you can get good jobs.

A huge proportion of people reading this could go out and buy a caravan or a new car in cash. Few of us can afford a good place with much space in SV or NYC or Sydney or London.