Come on you know why DC was impractical, Tesla killed that off early on.
I was born in 1938 in a very small town in Oklahoma, so I remember when we barely had electric lights at all in small towns and rural areas.
Metric made it to spark plug threads because they actually stayed in the cylinders. The public would never have voluntarily accept metric, still wouldn't in my opinion.
Tesla cars run on DC (yes, being an engineer, I do know who he was). Soon virtually all lighting will be DC. Houses running on solar panels will want separate low voltage DC circuits. Tesla, Inc. is introducing large batteries for home backup power. All DC. Get with reality: things change. We now have the computing power to automate even contracts for real estate options, real time.