Earlier quoted context omitted.
> I'm personally more or less a fan of open offices, but the noise really is a problem and unfortunate -- I wish the social convention were to treat an open office like a library, and louder conversations happened in private offices. Then what's the point of open offices outside of penny-pinching?
You say penny-pinching, but not all companies can afford the office space for all their employees from the get-go. At least where I work, we do get an implicit understanding of when it's quiet time, and when it's discussion time. Unfortunately the understanding isn't always in sync, but we're most of the way there.
With the caveats that is is one situation and we are in Dallas, my company could afford to give everyone a private office in the building we currently occupy for less than the cost of my salary alone. IMO, if you have enough money to pay developers market salaries you have enough to give them their own office if you wanted to. In fact, I would take a pay cut to get one.
Obviously some markets like SF proper and Manhattan are stupid expensive and this likely isn't true there. I'd wager that most of the world i closer to Dallas than SF, though.