[Carry_Okie]

Once you have done it personally, we can move on to business: Internet Data Centers, Medium Voltage Switchgear for most refineries, 15,000 Hp motors on pipelines...

I'd start with business first. Virtually every industrial motor 5hp+ has an electronic VFD on it (variable frequency drive). Electronic controls pump gas, supply well water, run refrigeration, sewerage treatment plants... Without food, water, and transportation with sewers backing up, dealing with personal computers seems rather trivial.

[thackney]

Virtually every industrial motor 5hp+ has an electronic VFD on it

This has not been my experience. While I have installed 20,000 HP VFD's, they are extremely rare.

I would estimate more than 90% of the pumps and fans in chemical plants, pipeline pump/compressor stations and refineries do not have VFD's.