from a quick glance at the feature list, it looks more like d3dx for dx11 - IE helper routines that implement some common low level stuff like loading assets and doing screendumps. probably some useful code there. and its full source, so its never obsolete - you can mod it any time you want. some of the features might be considered building blocks for a framework like XNA, but it doesn't seem to be a full blown framework - more like a collection low level helper library routines. with only 400 some odd downloads, odds are most folks are simply rolling-their-own code as needed.

with only 400 some odd downloads, odds are most folks are simply rolling-their-own code as needed.

For cryin' out loud - that's 400 some downloads just during the month of July 2015. There are over 46000 downloads all-time.

-- UE4/Unity
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-- XNA
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-- DirectXTK
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-- DirectX/OpenGL

My personal experience with it - it has a lot of useful helpful functions that are highly efficient IMO and memory safe if used properly so I really like it. I use MonoGame/XNA but am also expanding a DX11 game engine at the same time, so I would say it has some things that are similar to XNA(which I likes), but you have the source code too so you can see how it works and understand how to make your own functions that do similar things. For example, I found the memory alignment helper(AlignedNew.h) very useful (inherit into your classes/structs) for 16 byte alignments (optimization). So since you can choose what you do or do not want to use and you can see the source code, I think it is useful in helping to learn DX11+ plus it does not bring any limitations and since it is very popularly used, I personally would assume it is here for the long run. You could even use it minimally if you wanted and just use the parts most useful to you.