Anecdata, but the company I moved to a few months ago have 18 staff: only 3 of us have a dedicated work space (from the morning standups that I can see).

My brother works from home now and he's either in his living room or kitchen and my sister has just moved house and has converted one of the bedrooms to an office but prior to that worked from her dining room.

I've worked from home for a few years and have an office (spare bedroom we didn't use) so it's no big deal for me.

I'd love to see a large-scale survey around home office working.