yep I won't be upping until I'm sure its on the right track.
I had my hopes on hydrogen as replacement for batteries by now. that also seems too difficult to commercialise. yet there are a range of colours of hydrogen... bizarrely a right little rainbow for a colourless gas. they've been producing what is effectively 'green' hydrogen for (?)decades and that leaves a graphite soot for use in a range of industries,. it that one, almost the worst, is coloured grey.
so where are the hydrogen powered cars? a few years ago there were half a dozen businesses doing fuel swaps for ICE to H2. now there are none. no fuel available because there are no cars. catch 22.