Do not see any issues. As long as the Dead Front stays on and that it can be easily removed without having to tear into the wall, is what really only matters.
Does it apply to my case? If it does regardless of what the wall is made of I will be in violation as my setback from the surface is 4 in.312.3 Position in Wall. In walls of concrete, tile, or other
noncombustible material, cabinets shall be installed so that
the front edge of the cabinet is not set back of the finished
surface more than 6 mm ( 1 ⁄ 4 in.). In walls constructed of
wood or other combustible material, cabinets shall be flush
with the finished surface or project therefrom.
If you place a fridge in front of the panel it IS a violation.
That makes me feel good that the setup in the picture which is what I plan to mimic is not a violation even if the front wall it not drywall, but wood panel (the back wall where the panel will be is masonry(with 3/4 inch plywood to hang the panel and provide location for the first staple)).They are talking about a flush mount panel that is cut into a flat wall surface. In the pic you posted, it is the inner wall surface where the panels are, not the wall where the doors are mounted.
Says the one that was confused by the refrigerator visualization.If there is space for a fridge, it can be taken out of context. That is why it is best to leave out the really microscopic details and just put down the meat and potatoes of the job that you are wanting to do.
Get into too much about the hows and whys. You will find that these threads will drag on for days and get twisted around to where some start changing what you are actually wanting to do.
Do it right, do it correct, make sure that it is safe and within the local jurisdiction code enforcement.
Regardless what you see in the NEC. You have to read everything in that Bible to understand.
It is like someone picking out passages from the Bible, but never actually reading the whole book to understand what the meaning behind them are.