"As a programmer, thanks to plummeting memory prices, and CPU speeds doubling every year, you had a choice. You could spend six months rewriting your inner loops in Assembler, or take six months off to play drums in a rock and roll band, and in either case, your program would run faster. Assembler programmers dont have groupies."
Make stuff that works (aka stable), and make stuff that does things (aka has lots of functionality). Memory usage decrease - important, though hardly crucial for a major release, IMO.