This made me wonder about postgres. Is Postgres at risk of being taken over by some corporate? What can we learn from all these free open-source databases that has gone enterprise commercial.
That is a valid concern, see what happened with Redis or MySQL. But I think (while valid) it's very unlikely. Postgres can't be "bought". A company would need to start building an own version and make it better than the still existing open source version. Then they would need to convince people to pay for it. Not a good business idea.