>It’s like saying let’s use sail boats in the era of supersonic travel.

the era of supersonic travel?

I mean, sure, supersonic flight is /technically possible/ but it is exceedingly rare that the sound barrier is broken by traveling civilians.

My understanding is that the problem mostly has to do with air resistance increasing with the cube of speed; this could be overcome by going higher, above the atmosphere, but nobody has figured out how to do that at subsonic flight costs, either.

I mean, it is kind of sad; one of those technologies that we created, but that then turned out to not be as practical as the older stuff for everyday use.