alt Hacker NewsThat's interesting because it's way more complicated than that. Boston had the 128 loop and Digital. TI in dallas. Simi valley. I think it's more like the end of defense spending in the late 80s early 90s winnowed down the several "SV"s into only one.
I know, and the reason Digital and TI and Compaq weren't able to make as deep ecosystems as Xerox PARC or Fairchild did was because of the non-compete aspect back when companies were much more litigious than today.