Also mind that software doesn't stay the same either. As an example, LMDB (smaller, key-value DB) in its initial docs and slides bragged 30K of object size. Bui

Also mind that software doesn't stay the same either. As an example, LMDB (smaller, key-value DB) in its initial docs and slides bragged 30K of object size. Build current version, you'll get 60K, and there doesn't seem to be config options to just make it smaller. So either use older version, which is of course scary (who knows how many bugs was fixed later), or spend quite a lot of time tearing it apart, with unclear maintenance perspectives. Having something ROM and RAM optimized from the beginning seems like pretty good solution (if someone grew brave to do it).