Ivan Sutherland described the reason [1] why PCs won a long time ago. Basically a custom tool may do a thing "better" than a general purpose tool for a while, but eventually, because more resources are spent improving the general tool, the generalized tool will be able to do the same thing as the specialty tool, but more flexibly and economically.
[1] http://www.cap-lore.com/Hardware/Wheel.html