I've got no dog in this fight, but this isn't the first cabinet builder I have seen with a similar assessment of cabinet materials.
Thank you very much!! This is the transparency that folks who are doing research need. As you say no dog in this fight, so it’s great to see a non bias legit and in depth article. Of course MDF is used based on its low cost! Come on! Yeah the Kabinet sounds great, but not because of its MDF material, but because of its well built, incredible sounding and affordable Chinese made Kone. The Kone (along with the DSP intelligence) is the heart of the whole thing. If we are being fully transparent,( like in the awesome link that you added) there is really no other story to tell.
I’ve just finished my Spalted Sycamore Hardwood Wood cabinet. Solid wood on the outer shell and back planes baffles and 3/4” hardwood plywood in the inside. Basically a beautiful finish on the outside with with a smaller very lively and indeed punchy sound from the plywood inner box.