Yep, just scratch the surface.
The KNOWN tech we are ignoring is monstrous. Just go read through 70s Hot Rod Magazines.
It is amazing how much we forgot.
And we were all supposed to have flying cars by now.
(which is actually quite easy, but "Science" has decided to ignore that technology exists because 'gravity')
RE: Warnings from the past. Be careful how you think about Electric Vehicles (EVs).