@jia200x originally was talking about it. I guess because it uses the cc2420 that has some hardware constraints limiting some efficiencies of the radio hal. I think also because you can’t really purchase it anymore (I could be wrong).
For the record I have that board currently integrated with the HiL tests. I did want to suggest switching boards/radios to someone more accessible, like a dev kit, but that means some work for boards that potentially would not be used.