> There was no inherent "supremacy", just one created by a bunch of companies being together. That is why they have supremacy, though. Agglomeration effects ar

> There was no inherent "supremacy", just one created by a bunch of companies being together. That is why they have supremacy, though. Agglomeration effects are a big deal. Its why New York has remained a center of trade and finance for centuries, and why Detroit remains a hub for the automotive industry despite the city's bankruptcy. No matter what brought the companies there in the first place, just "being together" is a huge deal and is hard to replicate elsewhere. We will see if tech will be an exception, but my prior is that proximity is important, even with WFH, and that Silicon Valley will remain the national center of tech companies.