Indeed. Building frameworks for other people just doesn't sound like any fun at all. We also rolled our own thing in house, and every once in a while we start

Indeed. Building frameworks for other people just doesn't sound like any fun at all. We also rolled our own thing in house, and every once in a while we start thinking thoughts about polishing it up and releasing it to the world. But the amount of polish that you need to turn an in-house thing into an open source project is just immense. And worse, by the time you have it flexible enough to handle every possible use case, you've bloated it out to the point where it's no fun to use anymore. Pick pretty much any off the shelf ORM to see the end result of that path.