viability of 64-bit systems

http://www.diablofans.com/forums/showpost.php?p=483100&postcount=19
It has absolutely nothing to do with being (un)stable.
Have you already forgotten how it took them longer to get Flash on 64-bit platform than what it's taken Blizzard to develop D3? It wasn't the first and sure won't be the last "minor issue", and if something as trivial as that isn't supported at all, the sharpest among us could draw some conclusions. I'll check back in a couple of years, but everyone buying a 64-bit system for home use is just wasting money based on insufficient brain activity.
I'm not even gonna bother with the "runs stuff" argument. In case you weren't aware, operation systems also have other problems than just freeze-crashes where you lose all control.

TRUE OR FALSE?

Discuss.

There's many Lisps, but the one I'm talking about is Common Lisp, which is probably the most featureful, well supported and standardized Lisp out there.

Scheme is another Lisp which is used mostly in teaching and SICP, however it's very much a real language too, even though somewhat minimalistic.

The implementations I've listed are all implementations of the same standard, so your code will work the same in any of them, as long as there aren't bugs, but spec violating bugs are usually treated seriously by most CL implementors. Just use whatever you wish, I'd recommend going with SBCL, but you won't go wrong with the other ones. Most CL libraries will work in most of these implementations correctly, so there's no worry there. Things which these different implementations do differently are threading, networking, FFI, however, as long as your Lisp supports them, you can use a common portability layer/library and ignore the lisp sitting behind you, as the portability layer will take care of chosing the right functions for you. Anyway, these are minor details one can easily glance over once he knows the language.