> None of this is terrifying and seems overblown. I read the patent grant [..]

Considering that you entered this discussion instantly claiming that others are wrong without having even read the license in question makes this conversation rather..."open-ended"

> Also, the right of revocation only applies if the DNG implementor tries to sue Adobe. Why would they do that?

As I wrote above, Adobe reserves the right to use every patent that happens to be used to create this DNG from your design at no cost, and will revoke your license if you disagree i.e. with what they do with it.

> Occam's razor here suggests [..]

Or, as I suggested, it's simply hard to make a case in favor of developing and maintaining DNG with all that burden if you anyway have to support RAW