Code review comment for lp://staging/~sil2100/ubuntu-system-image/server_si-nondestructive

Understood about the lack of unittests for the cli. Yes, this is a big tech-debt that we should eventually pay down.

Looking more closely at the change, it seems fine from visual inspection.

I have one concern about the ui though. I wonder if it would be better to call the option --keep-orphans. That's both more descriptive and avoid the double negatives.