I'm not disagreeing with you and I expect full electric to be the future, but I and a bit disappointed with pretty much all the big car manufacturers for not having done enough... I think there's still some scope to improve ICEs in terms of both efficiency and reliability.
Christian von Koenigsegg has been talking for years about building engines with no cam-shaft, and it seems that's what he's put on their latest car - the
Gemera.
There's a bit more info here:
https://www.koenigsegg.com/gemera/engine-and-drivetrain/, but not having a cam-shaft allows for playing with valve timing to optimise the burn depending on conditions, removes the mechanical drag of the cam-shaft, removes the weight too, and makes the engine a bit more compact.
Obviously, a Koenigsegg ain't an every-day car! But, it seems a shame none (as far as I know) of the big car manufacturers pursued this.
Oh, and another car of theirs, the Koenigsegg Regera, has an ICE (plus electric) but without a gearbox! It uses electric up to... I think about 20 or 30 mph, before switching. And electric for reverse. Again, all reduces weight, and... well... it's interesting because once again, it's just different to what everyone else has done.
**FYI - I'm not in any way an engineer... I just lust after cars I totally can't afford and I'm a nerd!
:D