I made the switch to DDR4, but not because of the RAM. I did it for the newer CPUs and improvements to the overall platform. NVMe, more SATA ports, and all of that. But mostly I did it so I'd have a place to put my shiny new CPU.
I don't know anyone who uses more than 4 sata ports due to cheap SSD's nowdays, but I believe you, you like the new shiny stuff, so do I and I am a sucker too because maybe I will end up buying Skylake too
I was just hoping that I will convince my self not to by speaking out here, I hope it works.