Yeah, I realised after typing it that there's probably a huge amount of availability bias in my statement. It wouldn't surprise me if Wordpress MySQL deploys outnumber all rails/django postgres deploys combined. And the PHP mainstream isn't moving away anytime soon.
MongoDB, though - I do question that, however I have no figures and it again probably depends on the circles in which you move whether you see a lot of it or not. I don't move in node circles much, so I hardly see it at all.
Mea culpa. That said, in the startup-filled tech incubator in which I work, and in which rails is pretty dominant, postgres is king. Make of that what you will.
I work in the enterprise space and MongoDB is very popular. It isn't replacing MySQL or PostgreSQL at all (neither of which I've ever seen) but rather Oracle. And it's big in the higher end internet space as well:
MongoDB, though - I do question that, however I have no figures and it again probably depends on the circles in which you move whether you see a lot of it or not. I don't move in node circles much, so I hardly see it at all.
Mea culpa. That said, in the startup-filled tech incubator in which I work, and in which rails is pretty dominant, postgres is king. Make of that what you will.