You're not reading the answer well enough if you say Arjan ignores the game, n00b. He's talking about bringing back the "old Jazz" (which could just as well mean the character), not the "old Jazz game". If Arjan would want to port the old JJ1 game to anything I'd take it would be a relatively minor thing to convert/improve upon OpenJazz.

Actually, you might be sort of right... I'm noting just now that line about porting was translated badly. The word "porting" does not appear in the original dutch translation, at all. So that's a translation problem.