Breakfast++ that is a profound reason to stick with Java3D.
Hmm.. so I have the same reason to stick with Xith3D.
But that's pretty stupid : oh I know Ada95, so I just can stick with it and be happy. That's wrong. I'd better move to C++/Java/Python (python : use Soya). So, heh if you have begun a game using J3D, that'd be OK, but if you have the choice (you've not begun to implement yet), then think hard.
Now, it seems interesting to be able to write clearly the differences of J3D, X3D, and jME.
Hmm.. do you think J3D or X3D leaders would agree to say "The <project> project has been stopped. Here's the latest binary release. Please use jME/<newproject> now.