I don't know. I think it has something to do with the "Now with EVIL!" label on the side of the new box, though. They claim it's to free up space, though since it was never on as a default anyway, just available, that's kinda lame.
Oy, everything here is trying to sell me something else- I like how every last plugin they include with MAX, including the crippled demos, requires like four squintillion dollars in models in some proprietary format to really do anything nice, in addition to the full version of the plugin. At least the free third-party plugs should be around soon.
They do have some cool tricks in the new version, though, none of which I've really used yet (seeing as I'm still flailing like a spastic gibbon at Reactor- HOW THE **** IS THE CLOTH THING SUPPOSED TO WORK??? And why does it not take bloody hours to process for everyone else?), and most of which basically fix up things that sucked in earlier incarnations (like extrusion that actually leaves the original surface if you want it to) or do something that was standard-issue in lesser programs a couple years ago (like proper disp mapping). The biggest change, really, aside from all that Mental Ray yak I haven't paid any attention to in the slightest yet, is all these wierd architectural primitives they threw in. Which are nice, if slightly confusing. Less so than the Teapot, though.
EDIT: Ah, got the Tab panel back in place. Good thing I didn't overwrite any of my MAX5 files. Mwuhahaha, I'm, like, powerful now and stuff.