Here in central ny I have heard 2nd hand that insurance companys will no longer cover silos. On the large, 1000 head and bigger farms bunkering silage is most common. The volume of silage is just totaly impractal to put in silos. Also just backing up and dumping a load and "stacking" it with an articulated tractor with a degelman blade is likely much faster. Often farmers sell their block silos to the amish who put them back up with a smaller diameter so several families get a small silo out of one larger one.
Eric