That never works in practice. Specialists want to do the thing they specialize in. What happens when you have a bug that bridges across multiple areas of the co

That never works in practice. Specialists want to do the thing they specialize in. What happens when you have a bug that bridges across multiple areas of the code? Nobody wants to deal with those bugs because it would mean leaving their area of expertise. This also applies to anything that applies to the game as a whole, like optimization or look and feel.