First thing first, I presume you are referring to techies.
You may have remembered wrongly. Jobs, jobs, jobs 
is where people will go. Then availability of excellent entertainment (indoors/outdoors) for singles/DINKs and excellent schools for parents. Up until recently, is difficult to work remotely. The rise of cloud computing (the concept has been around for a long time, inflection point is around 2016) allows many businesses to coordinate work productively across different geographical locations, far more effectively than previous tech. Things are changing, albeit a bit slow, tech businesses are slow to change, got to disrupt 
these businesses. Ask yourself, what make AMZN so confident that they can have two HQs in two far apart geographical locations? If can have two, why not 3, 4, 5, 6, 7, … get the picture?
Remind me when fast internet is ubiquitously available? Fast means? 1 Mbps, 10 Mbps, 100 Mbps, 1Gbps, or? Apps, apps, apps, is the driver, mere infrastructure like fast internet is not sufficient.
Most importantly, remember to buy some cloud-based work collaboration and comms stocks 