@jgoerzen i completely see your point! i've been looking for a similar solution as you, albeit the size of my problem (or library) is much smaller.
still, i don't think i'll go the librarything way :-( for me, centralisation, partial ownership by amazon and no safeguards against eventual sellout are red flags.
as primitive as trying to replicate it with #openlibrary lists looks at the moment, i'll rather try that one.
still, thank you for bringing this up!