I found a wiki for your 11.9Gbit 
( and we speak not about DCI 
)
@DensestSnail693 ah, there was a little edit. Yep, let assume 3GB. … ähmmm… I removed the confusing sentence with SATA 
… I have in mind PCI3 
@GoSammy1971 yes, the high load is not allways. Its some release ago than I checked that. I also assume that in most cases only the “index” is checked.
And also for DirectStorage: yes… the loading time into the game is may be also not realy affected, just because at these point no huge textures must be loaded. So, yes: more exact to say is: the loading into the flight becomes possible faster. I also assume the effort isnt it worth, but users hear somewhat, creates whishes over wishes and then the priorities goes some times strange ways ( on other side its also a publisher behind that game, and these publisher is a big fan of direct-storage ).