Iron-air batteries (1,200 Wh/kg), and in general metal-air [1], might bring a surprise after 2024: December 2022, "Form Energy will site first American iron-air battery manufacturing plant in Weirton, West Virginia" [2].
[1] 2017, Yanguang Li, Jun Lu, Metal–Air Batteries: Will They Be the Future Electrochemical Energy Storage Device of Choice?https://pubs.acs.org/doi/10.1021/acsenergylett.7b00119 Betteridge's law of headlines answers "no", but good overview.
The various "-air" batteries tend to have major downsides...
They tend to get heavier as they discharge. They usually aren't rechargeable (or if they are, only a few times or with much lower energy densities). They tend to self-discharge within a few weeks of non-use.
Yes, there are downsides, as always in engineering, it's a matter of managing the compromises for the current implementation and researching better solutions for the next iteration.
its worse actually for ICE because you are probably only accounting for engine efficiency but there are also transmission losses to the wheel. Further all the 3000 or so component of ICE weight fair bit too. I have not seen any analysis on combine energy to the wheel/Kg comparison between ICE & EVs but I'd bet it gets significantly worse for IC cars even at 500wh/Kg.
Bumping the energy density closer to something like lithium-sulfur would probably make 95% of ICE-based technology scrap heap tech.