Out where? East of Redmond is MOUNTAINS. West of Seattle is WATER. So shove it way more north and south? And increase traffic 10 fold while waiting 30 years for the highways to catch up?
That mountains are still 20+ miles east of Redmond. There's still plenty of building opportunities if you look around Redmond Ridge, Duvall, Carnation, Fall City and Monroe.
It doesn’t affect traffic that hugely if people are fine with living out in the vicinity of the suburban and exurban campuses. Which for a number of decades including when Microsoft was being established, they were. There was a net outflux from many cities in the US. Most people wanted to live out to way out.
