Facebook took over Sun's old campus, and I imagine some corp would take over Google's campus if they left. Ultimately office space is office space, and planning

Facebook took over Sun's old campus, and I imagine some corp would take over Google's campus if they left. Ultimately office space is office space, and planning for a mass regional exodus seems unwarranted. Most or all of the cities mentioned can accommodate new housing developments as easily as office parks now...it seems like a reasonable means of allocation. I don't even think crazy annexation schemes are needed...what would really change the region is a unified school system.