Reminds me of what happened once most people and households transitioned to individually-carried cellphones as opposed to the 'house phone' (i.e. landline). You used to have to call 'the house' before you got routed to someone else within it, and that would often be cause for catching up with a person incidentally, and now that's just, totally gone! A great example of the trade-offs to navigate when improving systems for efficiency.