Paul, I think it really depends on what you want to accomplish. Some folks simply want to taste all of the arts and see how they operate. Sure, they know they'll never be a master, and likely never even be proficient. But that isn't their goal. So, what should we do before switching styles? That's up to the person, and we can't judge them for their choices.
The weakest of all weak things is a virtue that has not been tested in the fire.
~ Mark Twain
Everyone has a plan until they’ve been hit.
~ Joe Lewis
A warrior may choose pacifism; others are condemned to it.
~ Author unknown
"You don't feel lonely.Because you have a lively monkey"
"Ninja can HURT the Spartan, but the Spartan can KILL the Ninja"