Does changing editions of games benefit those who play them?

Games Discussed:

Star Wars (West End Games & Wizards of the Coast), Shadowrun,  Dungeons & Dragons, Aces & Eights, Legend of the Five Rings,  Mutants and Masterminds, Pathfinder, Hero System, Call of Cthulhu,  GURPS, Star Trek (FASA, Last Unicorn & Decipher), Battlestar  Galactica

Links to Check Out:

Dead Gentlemen 

Chessex 

Margaret Weiss Productions