The NYC financial mindset has little to do with it. It's more useful to compare SV with Route 128. In the late 60's both seemed to be roughly equivalent: dominant technology schools, an educated population, and a strong hi-tech business base. But there was a strong cultural difference. If an engineer left HP, he would be encouraged, and often HP would be a customer. If you left DEC, you were a traitor. You were the enemy, never to repatriated. May your children burn in hell. In the end cooperation beat out secretiveness and destructive competitiveness.