Comment # 57 on bug 1226122 from Mario Guzman

After reading up on sdbootutil I see it would be very bad for multi boot
environments such as mine. So I have a suggestion to think about that may ease
the pain for multi boot users: The installer currently has options for Grub,
bootutil, or none. The none option now prevents /boot from being populated with
the needed modules. How about adding another option called "compatibility" (or
whatever name) that is basically like selecting none, except it populates /boot
as it has always been doing in the past. /boot gets populated as before and the
firmware is not changed. Obviously this may result in some limitations such as
the enhancements planned for sdbootutil like boot snapshots, disk encryption,
but it would allow multiboot to continue on.

I have been following the links above to see how far things are progressing so
I can test but it looks like some work to complete.