Well for example, frodoplayer keeps track of the last song you were listening too. It writes this when you exit or shutdown.
This is a pretty important feature in my opinion, so i'm not listening to the same song every time i boot up. I like it to pick up where it left off.
When destinator can be run off that partition I want it to save any new addresses I put in there.
So it'll be one write every time i shut down and one more every time I add an address. Compare this to how many pictures you can take using the CF card in a camera and it seems very reasonable to expect the CF card to last for a very long time.
I'm sure I won't start my car 100,000 times before it will be in the junk yard.