Bynum isn't any better than Cato was. Why trade a potential KG level talent for a guy that at best answers how Cato would have been if he were injury free? The game has already moved away from the likes of Shaq and Big Z. The new 5's are actually 4's with an expanded skillset for their size that borders on that of a 3. Bosh, Howard, Duncan, Amare, Garnett, Rasheed, Okur, Al Jefferson, Dirk, Jermaine O'neal, Gasol, even Yao Ming is going to be living out at the top of the key and using his skillset despite his size to make a living in todays NBA. The plodders may not be extinct, but they don't impact the game the way guys playing in Amir's position do.