To possibly help mutual understanding:

On Mon, Nov 12, 2018 at 02:00:32PM -0500, Jan Harkes wrote:
> It isn't more widely used because the library source is tied into the
> Coda build infrastructure, does not come as a dynamically linked
> library,

Static linking has its value and use cases.

> has insufficient documentation, and there are lots of
> alternative embeddable key/value stores like gdbm, db2, sqlite, tdb,
> leveldb, lmdb, and of course cdb.

The variety is an indication that neither of these covers all needs.

This becomes even more noticeable if one is concerned about licenses and
especially with static linking.

Cheers,
Rune