@jackvance:
Heh, nice interpretation difference we got: maturing and keeping your style, or adjusting your style through maturing. Seems like semantics. But anyway, the thing is, if we would have gone with the whole "let's look at the past and extrapolate to the future", Robin never could have joined.
I´m also so tired of that argument, so please if you are interested in an elaboration of that read this post because I´m tired to type up such a large post again and again.
And I think that you know that an exception defines the rule? Nico Robin´s joining was different because of the reasons I mentioned in the post I´ve linked. That doesn´t mean that the how you call it "let´s look at the past and extrapolate to the future" won´t come for her in an upcomming arc. When did we see Nami´s flashback, in the Buggy or in the Arlong arc? Don´t act like Oda pulls this the first time with Robin. In fact it is the second time and it only happens with the female members of the crew. If I´d like I could actually say that this is another rule.