I like this approach; it's something I've thought often about with our code base. The only thing that I keep hanging up on is the endpoints of systems - gettin

I like this approach; it's something I've thought often about with our code base. The only thing that I keep hanging up on is the endpoints of systems - getting stuff into and out of JSON, or talking to a database, or interoping with other libraries. It wouldn't be rocket science, but there would be a lot of boilerplate for converting back and forth to primitives, and then bookkeeping to make sure nothing broke along the way. I really should bite the bullet and do it.