I have only heard it referred to in passing such as here:
Because the Radical FT is stated as compatible with skis over 100mm under foot, a lot of people mistakenly believe that this means it’s a stronger binding suitable for freeriding. This is definitely not the case – they are still only a lightweight touring binding – ie if you use them for lots of off piste resort skiing then you risk one of the following: the pinholes in your boots wear out, the pins on the bindings wear out, the rear of the binding snaps off, the binding rips off the ski (yes, it still happens with the Radical FT), or you break your leg – we’ve seen all of these, including a couple to ourselves – so you’ve been warned!
I have skied with these guys and trust their opinion, but then again I have seen quite a few people with Dynafits mounted on a variety of fat skis.
Do dynafit also make some kind of base plate for fatter ski mounting?