Whoa, almost missed this part:
https://blog.elementary.io/os-8-1-available-now/
' For the first time we now also offer ARM64 builds for devices that boot with UEFI. This means you’ll be able to run OS 8.1 on M-series Apple Silicon ’
So, wait, what, could I theoretically now dualboot @elementary on my M3 Macbook?
(Yes, I'm asking this on a Christmas Eve 3 AM, so no, I don't have a life.)