I see that you offer "append only mode" as a core feature. How do you deal with pruning of old backups in this case? Regular borg only offers two options: eith

I see that you offer "append only mode" as a core feature. How do you deal with pruning of old backups in this case? Regular borg only offers two options: either pruning does not decrease space used at all; or pruning permanently commits changes, negating any security advantages. Both of those seem bad enough to prevent offering "append-only" commerically?