This is why I'm going for 64GB in my rig. 32GB is plenty right now, some would even argue that 16GB is still good (especially for more budget builds), but I stay on my rigs for a long time and rarely upgrade. When I upgrade, it's usually the whole build, it's always a pain finding a way through the maze of compatibility once a couple of chip generations have passed. Heck; this current gen is having compatibility issues in its own time with same-gen hardware.