as usual, im not sure if im right, but hyperion said that they compiled everything in 68k to start with to fully test out the JIT engin. Which to me sounds like its a good idea because face it, theres really not alot of Amiga usrs and even less beta testers and only having one or two apps to test it isnt going to test it properly.
So to me, sounds like a good idea because just about every system component from apps to drivers shall be 68k. Good idea! Wide variety of testing too!