@rms Don't some hybrids use supercapacitors rather than a battery, thus rendering a charging plug in those mostly pointless?

That's rather pushing for all hybrids to be; "Plug-in hybrids".

I reckon a supercapacitor hybrid really would remove a lot of the inefficiencies of ICE's while also not having a battery to wear out.

Unfortunately, almost all modern electric or hybrid cars are ruinous for your freedom due to all the spyware and proprietary software that is remotely updated, or updated at the dealership.