MongoDB was only really ever a competitor to memcached, redis, others and really only good as a caching layer like those. It is decent for that. There was a t

MongoDB was only really ever a competitor to memcached, redis, others and really only good as a caching layer like those. It is decent for that. There was a time when JSON wasn't that integrated into databases, it is now. That was really MongoDB's killer feature. PostgreSQL does most of this better now and more robust/reliable.