Some buildings in Microsoft still do. In my building, most people SDE2 level and up has their own, and below that most seem two-to-an-office (there are counterexamples on both sides though, as well as a number of empty offices). Oddly they're refurbing existing buildings to remove the private offices though. It doesn't seem like a space problem, nor a money problem. Apparently there's just a desire to get rid of them for who knows what reason, spending a lot of money and morale (employees have to relocate to temp offices in downtown Bellevue for a year while they refurb a building on campus) to do so.