There is the https://en.wikipedia.org/wiki/X32_ABI for AMD64 at least. But it's looking rather bitrotten and is frowned upon by the snobs. Nobody is using it.

Justine Tunney's https://www.justinetunney.com/ APE and Cosmopolitan libc shows what's possible, though.

https://www.justinetunney.com/cosmo3/

https://www.justinetunney.com/ape.html

https://www.justinetunney.com/matmul/

And then there is vibecoded stuff like https://isene.org/chasm/

I think there is much more to be expected coming from that direction, overthrowing decades old cargo-cults :-)