How many holding with their present version of Photoshop?

Just curious. I realize that those using PS making a living with it have to stay up on it, but going from version to version, i personally have not learned everything it is capable of before moving on. Interested in other thoughts on this. Just how much PS stuff can you use, where do you draw the line?
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http://www.pbase.com/davidjaseck

Don't take yourself too seriously....nobody else does!