So @geerlingguy broke the 3GHz barrier, https://www.youtube.com/watch?v=TTIkZBsVJyA. If you want to do it too, first you'll need to win the silicon lottery, and then you'll need to grab the very not at all recommended firmware from Github, https://github.com/raspberrypi/firmware/issues/1876#issuecomment-1997785709. Good luck!