I wonder if I'm the only sysadmin in the world who doesn't hate MongoDB. Yes, I wouldn't use it for new projects, and yes, I wish RethinkDB had taken its place, but it's not as horrible as people seem to think. Default configuration... If it weren't for RDS' doing PG-bouncer-style connection management, 95% of production postgres instances would probably fail. It innodb_buffer_pool_size wasn't set properly, plenty of data-centers would light on fire. If no one setup a firewall or AOF for redis, it's data-loss and data-exposure waiting to happen. If no one adds auth to an HTTP route, it's open to the world, etc etc etc. If tech-stacks were legos, software engineers would earn a heck of a lot less.

I absolutely agree it's been used by people who just don't want to write SQL queries, or being used as a text-search-engine in place of something like more appropriate like ElasticSearch, but to mock successful projects who were based on it seems silly. It reminds me of interviewing candidates at a startup who primarily used PHP/MySQL. Most of them openly laughed and called it all horrible. I voted "no" on them, and sometimes injected a somewhat toxic "ah, you're right - we should close up shop. Someone call Facebook - tell them their tech stack is horrible - shut it all down!".

You can learn a lot about a developer by asking "What do you think about Mongo, JavaScript, or PHP", and if their response isn't a shrug, they're probably more concerned with what editor is correct than if the product they're building is useful. It's an exceptional filter to reject zealots and find pragmatists.

All that said, MariaDB with MyRocks is _awesome_, but certainly not with the default settings :)