And also, 10 miles is a really long distance. Most people consider anything more than 1 mile un-walkable for a commute, so what about all the people between 1 to 10 miles?

And what about visitors, contractors, interviewees, partner company employees, and everyone else who can't take the bus? Why aren't the buses a part of the local transit agency, and why does the local transit agency not even bother running frequent route anywhere near Google, Apple, Facebook, et al.? Why aren't there air-conditioned express Wi-Fi VTA buses, or better yet, fast (>80mph) electric trains, plying up and down 101 and 280 serving all the tech companies in one go, stopping at each HQ, considering they are almost all right next to either highway? That would be a low-carbon world.

Also, one of the inherent problems with employee shuttles instead is that they compete with public transit, and also reduce the flexibility for employees to go to other places after work. I've known many employees regularly go to FLAG companies via the shuttle but drive to work on days they have dinner appointments with friends. To a great degree this also propagates the cycle where public transit becomes progressively worse in coverage and maintainence, and progressively more for low-income individuals only.

Compare to many other public-transit-first countries which have trains/buses that are actually fast, clean, nice, comfortable, and not worse than taking a company shuttle + you have the flexibility to go whenever you want, as well as wherever you want after work.