It is pretty much never going to be printed. The book has to remain available for free and never for profit according to the deal I've taken internally with Heroku to work on it.

The only way it gets printed is if Heroku decides it feels like allocating time and resources getting this printed by working with a publisher, which is way outside our usual line of work there.

I don't see the incentive for the corporation to do this, financially or otherwise.