That's all well and good as long as you're a student, or partying your twenties away and as long as everybody in the house gets on .... I've done this, and while it is good fun in parts the downsides become downright tiring.
I think what i want to say is that for most living in a shared apartment is not a thing out of necessity anymore, but out of choice
Why the assumption that all roommates everywhere are partying?