DRAM is fundamentally different from logic. Logic cells are like those in your processor, and in that form, they're all the same sort of thing: switching transistors. DRAM is different because each cell is made up of a transistor and a capacitor, and that complicates scaling. For a long time now, we've been making those cells with a geometry known as "6F²", and the 'holy grail' was the ultimate move to 4F², offering a theoretical 33% density improvement. Now, Micron says that despite putting "over two decades" of research into the idea, it's throwing in the towel and sticking to 6F² for the foreseeable future.
A 30-year PC building veteran, Zak is a modern-day Renaissance man who may not be an expert on anything, but knows just a little about nearly everything.