I think a stronger basis for that is probably the Neomacs project aiming to rewrite the elisp layer and all C code in Rust, incorporating GPU rendering etc alon

I think a stronger basis for that is probably the Neomacs project aiming to rewrite the elisp layer and all C code in Rust, incorporating GPU rendering etc along the way, see https://github.com/eval-exec/neomacs https://github.com/eval-exec/neomacs