A lot of the things we do on a daily or weekly basis have ways of doing them that can either be private or communal, some of these which we do not think to consider as having that characteristic.
For example, bathing in the Roman Empire used to be communal, but then Rome fell and citizens in the splinter countries began taking baths privately.
Receiving mail is another example. There are countries which don’t have mailboxes and everyone gets their mail at the post office in the PO boxes. It was the United States which pioneered the idea of the modern mail system, which is why we associate it as a private act.
There are activities as well which don’t have any history as jumping between one or the other that might benefit from it, for example I think towns might benefit if internet was free and freely accessible but only at the local library.
What’s a non-communal aspect of life you think should be communal?
Literally every college kid ever. Lots of apartments and dorms have laundramats. They save space within the units, you can do two or three loads at once, and when you’ve got one per floor its never really a problem except on the day after exams when everyone is cleaning up and shipping out at once.
In my experience, a little insulation goes a long way. A couple of extra inches of wall thickness transform shouting/cheering/screaming kids into faint muffles. Meanwhile, anyone that’s had to live in an HOA community knows the annoyance of getting a nasty-gram from a neighbor down the street who might as well have had her ears shoved up against your window in order to complain that you had a party.
Folks in the suburbs somehow manage to develop Superman hearing and still complain about everything. Folks in midtown townhomes experience night-and-day differences when they get double-panned glass. Nice apartments have thick walls (good for heating/cooling as well as sound-proofing) and let you enjoy your privacy as soon as you shut the door.