The MDC thing has nothing to do with you. It's a perennial complaint among cryptographers about how PGP's design has escaped modernity. It's weird that you think HN is somehow the center of that phenomenon.
It's an archaic premodern construction that cryptographers hate but that hasn't been demolished in a paper yet, in part because lots of people use SSH and very few people seriously use PGP. I'm confused, though: what would it have to do with you?
