Enables something else not thought of yet. Also: Linux support for installing on APFS like NTFS?
Technical challenges like these always have value: for the satisfying intellectual challenge, comradeship but also they may well enable a further feat not thought of yet that will have further value. Inherently worthwhile. As well reuse of ideas, ways of working for other projects, friendships nurtured.
Running Linux directly on the NTFS filesystem was something fairly recently reported by TheRegister. This would mean that one could install Linux on an existing Windows installation. Highly useful in several cases I think: no need to partition, can share files more directly.
Linux on APFS then too? This takes the same concept of Linux on NTFS as outlined above but for Apple machines. This would compliment the work being done here with running Linux on M1. The work required would be for Linux kernel to support being run on APFS like has been done for NTFS.