This mostly seems to be a solution in search of a problem, IMHO. SSDs have really done a number on RAMdisks.
This is true, I can speak to it from personal experience.
My real-world app of interest is
Metatrader 4, and when operating in its strategy testing mode with my particular trading algorithms it churns through the small file I/O's like mad.
My initial solution from long ago was to use Iram drives in raid0. That helped with the small file IOPs.
^dual Iram in raid-0 on areca 1280ML card w/2GB cache
Then I went to ramdisk with superspeed because it was easier to maintain than the irams which had no automated image creation and restoration during system shutdowns like the
superspeed ramdisk do.
^5GB of DDR2-800 ramdisk
But then along came SSD's and completely disrupted that marketspace. Oodles more capacity at a fraction of the cost and for all I could ever determine they delivered the same effective performance as far as my apps were concerned.
^140GB Intel G2 on areca 1280ML card w/2GB cache
The benefit of a ramdisk over traditional disks was the small file IOPs - exactly where SSD's deliver. The benefit of today's ramdisks are not in the small file IOPs but in the large file transfers which can be GB/s.
Today's SSD's are so fast that I've ditched the 1280ML card (a $1400 investment) and just connect the SSD straight to my mobo.
^ OCZ Vertex3 on MIVE-Z
Meanwhile my superspeed ramdrive has continued to benefit an improve in performance from the advances in ram speed, but I don't use the ramdrive for anything other than benchmarking tests because the SSD is fast enough and far and away more convenient to manage at a practical level on a daily basis.
^ juicy performance but still not worth the frustrations of randomly losing your ramdisk image file in the event of an non-routine system shutdown (BSOD, system hang, etc).
As a former ramdisk believer and user, and as a person who still needs and uses the kind of performance a ramdisk offers, I won't touch a ramdisk ever again unless for some reason flash-based SSD's became non-existent.
IMO the sun has set on the consumer ramdisk scene.