I'm not trying to argue your point, but I bet most would be surprised by how little of a perceptible difference the speed of the SSD storage makes.
Here is a test of a 960 EVO SSD drives with max throughput of 3200 MB/s read and 1500 MB/s write, compared to an 850 EVO SSD with read/write speeds of about 500 MB/s in real world terms:
Windows 8.1 Boot time:
Samsung 960 EVO ~ 15.3 seconds
Samsung 850 EVO ~ 15.5 seconds
790 MB 4K video load time:
Samsung 960 EVO ~ 6.5 seconds
Samsung 850 EVO ~ 6.5 seconds
523 MB GIMP image load time:
Samsung 960 EVO ~ 8.3 seconds
Samsung 850 EVO ~ 8.5 seconds
159 MB Project opened in Visual Studio containing source code for LLVM toolchain:
Samsung 960 EVO ~ 6.5 seconds
Samsung 850 EVO ~ 6.5 seconds
These figures are from the following article:
https://techreport.com/review/30993/samsung-960-evo-ssd-reviewed
I was pretty surprised by the results of the test. I'm sure Apple drives would do better, but even still, the actually real world performance is very close in most cases.