Hi "BA", Darik here.
DBAN is fully supported. See the thousands of questions that I have answered in the public forums.
DBAN is high quality software. It is very stable and rarely needs to be fixed or changed.
DBAN is easily customized. I make money working on DBAN, which is why it is such a good product.
DBAN is backed by a professional, me, educated in the field with years of experience. Can you call any other vendor by name? Can you speak directly to other product developers?
DBAN also has numerous unique benefits, like a public bug tracker and auditable source code.