Ironically, most of the larger tech companies based out of the valley are closer to the highways than they are to the Caltrain stations; the shuttle shitshow at MTV/PA is testament to that.
Nothing ironic about it. When these plots were being sold off the car was king (and really still is) and passenger train service was almost discontinued due to lack of ridership. Putting tech centers next to freeways was quite sensible at the time.