I've read that having an SSD in the macbook air negates the need for more RAM. Its my understanding that RAM allows for faster access to program info than accessing a spin-up HDD, because RAM has always been sorta like flash memory. And any extra memory required above and beyond the capacity of the RAM goes to the HDD. So if you have an SSD that pretty much can be accessed as quickly as the RAM, then it shouldn't make much difference whether you've got 2GB or 4GB. Is this correct?