Board Thread:Spoilers!/@comment-26159109-20160301190120/@comment-24674051-20160319143241

Honestly, He's had 200 years to adjust to being one-handed, and is probably more comfortable with the hook. Besides, his hook is also his secret key to his safe on the Jolly Roger, and having the hook allows him to keep his key with him most of the time (except when people steal the hook from him).

And seriously, if he didn't have the hook, we'd have to start calling him Captain Hand. lol