This.
And along those same lines, there's not a normal user on earth who can tell the difference between an SATA 6 drive, and the same drive running off PCIe. There's enough 4k I/O operations bandwidth on either interface to satisfy any desktop or light workstation user, but Samsung will tell you proudly how much faster the exact same drive controller and flash hooked up by PCIe!
But the industry has nowhere else to grow except lower prices for higher capacity, so we're all making the transition to M.2 and NVMe JUST TO BLOAT WORTHLESS BENCHMARKS!
Instead of letting NVMe be the thing of servers and high-end workstations, EVERYBODY GETS multi-Gigabit block transfers!
Pretty soon the things will be faster than ram at block transfers, but still too high a latency to actually replace it. But what use is that to anyone, when you're still limited bb the rest of your system that has to process the data?