The closest I was to get -current working gave me this but I'm unsure where this fails (my best guess would be that something went wrong while loading the second FFSv2 partition)
SUCCESS!! All thanks to @0x47DF@twitter.com 🙏
Steps to get it to work:
1) Update your eeprom to at least 2020-09-03 (https://github.com/raspberrypi/rpi-eeprom/releases/tag/v2020.09.03-138a1). This is necessary to allow EFI partitions to boot
2) Flash your sdcard with 2020-12-09-netbsd-raspi-aarch64.img from http://mail-index.netbsd.org/port-arm/2020/12/09/msg007119.html
3) 🎉
@kit_ty_kate because there are multiple versions of UFS/FFS.
FreeBSD has their flavour, NetBSD too and also OpenBSD.
While they come from the same BSD heritage, there has never been any effort to standardise or establish inter compatibility for UFS/FFS.
Also wtf, how is the UFS support so bad in Linux??