@magdesign I haven't any android which supports a/b partitions.

@povoq you have to manually update it.
If you have an op3 then you can try it
https://androidfilehost.com/?fid=14943124697586369300

The above link is an ubports version edge.
Maybe have some bugs.
Before installing make sure that you have backup of boot.img.
You don't have to alter anything from system partition.

Re: Is dual boot still possible?

I modified the ramdisk to boot android and ubports without altering the system partition.
https://youtu.be/B3rjozOVQQw