Agreed. It is surprisingly hard to lose some of the assumptions spinning rust has left us with. Treating this as a log-structured 'soup', I think, opens up interesting possibilities.

Interop is vital, though. I'm less concerned with being able to pull and seat a drive between machines[1] than sensible replication/backup, and a 'send/receive' type-thing shouldn't be too big of a deal.

[1] Thumb drives are an obvious exception.