I really do not know the importance of Platinum Status other than you get to board faster in the VIP line and get off the ship a little faster. I don't think there are anymore perts that go along with it.
When they use to have the "Carnival Cruise Club" we could also use the VIP line and not be Platinum.
If you upgrade to a suite, then you also get the VIP treatment without being Platinum.
I think that they should change the way they promote the Platinum status. In stead of having to sail 10 times, if out of 6-8 cruises you upgraded to a suite thus spending more money, then you should not to have sailed 10 times.
Just my opinion.