Wrong, flash memory is still significantly slower than RAM. Even the iPhone, which is entirely solid state flash hard drive, has high speed RAM.

And like I said, the speed of the RAM isn't maxed out, its the amount of info that can be moved between the RAM and the CPU that's pretty much stuck. It's still increasing, but not nearly as quickly as it used to be. As software uses more and more RAM, more and more info needs to be swapped between the RAM and the CPU cache. There is a reason that the RAM is literally right next to the CPU