Would they have space? Considering that Github was always remote, that's a lot of people to fit into existing space. Though I guess it depends on how many Github employees are within 50 miles of Redmond.

And, in my experience, a 50 mile commute into a big city isn't really sustainable--and that was with a fair bit of travel, etc. mixed in so I wasn't going in every day and pretty accessible commuter rail service if I was going in 8-5 or thereabouts.