An argument can easily be make that Jai could have been released as closed-source, some time ago. Many fans and the curious, just want to be able to get their hands on it.

Jon is not going to stop public reaction nor will Jai be perfect, regardless of when he releases. At least releasing sooner, allows it to keep momentum. Not just generated by him, but by third parties, such as books and videos on it. Maybe that's where Jon is making a mistake. Not allowing others to help generate momentum.