Martin, where you will find so many volunteers, who can support this project if it will be "opened"? I'm looking around and see no one.

And - this is my own opinion, but "open source" now - is only the method of stealing programer`s time and goodwill. Ok, in Linux, were system is "free" for all - it can be used, because it still create a some kind of sum from multiple sources: single authors, companies...
But here? Where everything is payable - even drivers! Opening under "free" licence will make only one thing - a GIFT of complete, workable thing to Mensys. They put own copyright on it and will start to distribute through subscribtion service

And this - after all of this years, when Gorbunov proclaimed OS/4 as "piracy", fight with it everywhere (even with loader, ok - kernel can be questionable).
Do you really think what someone wants to make such gift for such persons?