Since the beginning of the 80, when the current unsustainable debt system started, the growth of all of the so called services and on some level IT jobs have been fueled by the constantly mounting of new debt. If this were not the case, the growth would not have been so rapid, and the others part of the less efficient/not needed economy would have been fast annihilated and not allowed to exist as in the current system. These jobs tend to be concentrated in or around the cities and here it stands very basic relation, between the reason most of the collage graduates are going to these places. In most recent time, the current bubble-debt based system was not allowed to re-balance naturally in 2008, but was fueled by cheap money by the FED. This continuation and inflammation, on it's own, tends to accelerate the movement human resources to these cities, by allowing these regions to mount more and more debt. At some time in the near future, this bubble, and the current debt base system, will deflate rapidly, via inflation (very disruptive for the common people) or any other means, not excluding some kind of sever social disruption/revolution. When this happens these places of concentration will be the hardest hit due to inability of the masses to sustain themselves, without the system allowing debt base/resources extraction to the cities.

Enjoying some 300-400KV sparks at home usually costs me several electronic measuring devices, this is why over time I have migrated to the old ( and lovely beautiful ) VT. With their robustness they can withstand most of the high voltage spikes one can get, unless of course it burns it by going over it power ratings. This is not to say for the poor digital controls they will "smoke", if not extremely well shielded, even under simple HV pulse in the ambient environment. Note, the dielectric impulse will find its way in the most supplement one to ones electronic controls. This is why it is an interesting , and amazing, read about one of Tesla's ingenious experiments: http://uncletaz.com/library/sc... Regrettably, our technology evolved in the most unnatural way of processing information: low voltage and (comparatively) high current versus high voltage and (comparatively) low current, which is the natural way to move energy/information in nature.

Actually it was invented about 20 years before that, by a little known inventor with the name of Thomas Henry Morey. The solid state valve (build with Germanium), as it was known, and patented by the way, was invented connection with Dr. Morey's energy device that was pulling power from the charged dielectric around us ( a fancy name for the air close to the earth surface ).