Especially for information technology, I don't understand the rationale why it has to be concentrated at certain places. As long as there is a good net connection, it could be anywhere in the world. Let's concentrate on the US for a moment. Why can't a successful startup not be in Dallas, Amarillo, Miami or Des Moines? Talented people already move from one coast to the other, so they could as well move to any other place. The rest of the country's infrastructure is so good that you could connect venture capitalists, founders and customers in any arbitrary way.
I also say to the main point of the articles: rents have a lot of room to grow under the current logic. City centers simply get voided of average earning people and replaced by high earning ones. As soon as they are the average earners, even more wealthy people move in. Also with the rents, salaries go up, so people have the possibility to pay for their accommodation again. While in Berlin you could easily live with 40.000 Dollar/year, you'll probably have to add another 60.000 so people are at least somehow able to move to work for your new shiny SV company.
I also say to the main point of the articles: rents have a lot of room to grow under the current logic. City centers simply get voided of average earning people and replaced by high earning ones. As soon as they are the average earners, even more wealthy people move in. Also with the rents, salaries go up, so people have the possibility to pay for their accommodation again. While in Berlin you could easily live with 40.000 Dollar/year, you'll probably have to add another 60.000 so people are at least somehow able to move to work for your new shiny SV company.