When one or two firemen are electrocuted fighting a blaze this stuff will be gone - or the flipside, no insurance company will cover your home as the fire department will not go up on the roof. Heck, that may happen even with more traditional panels sooner than later.
With earlier model panels, it was sufficient to have a cutoff near ground level as they were not efficient enough to still be a major risk. Apparently not any more. Firefighters are also nervous about going up on a roof that is overweighted.
I am not a fireman but have spoken to quite a few in an effort to make policy for my HOA after we were legally mandated to allow solar installations. Too little thought is put into the many ramifications of solar panels, especially in attached homes.