Well, Donald Knuth for one. Here's a blog entry I wrote about Donald Knuth and how he asked for this a while back. I think it makes a lot of sense and I'm really glad to see this maturing!
http://blog.reverberate.org/2011/09/making-knuth-wish-come-t...
http://www-cs-faculty.stanford.edu/~uno/news08.html
Saving 32bits means a lot to him.
http://www-cs-faculty.stanford.edu/~uno/news08.html
Saving 32bits means a lot to him.