If you want to kill x86, you need to do what Valve and the Wine foundation did with Proton/WINE (mostly proton at this point though), but for x86 to ARM and maybe other architectures like RISCV (especially because the milkV pioneer is a thing).
There is too much legacy software that will never be converted that people still use to this day. Once you make it easy to transition, it will slowly but steadily start to happen.
Box86/Box64 are promising, but need help from contributors like you. If you want it to happen, go make it happen, or continue to live in the world you have now.