He'd enjoyed a few drinks by the point he spoke to everyone, and the resulting honesty (accompanied by what I sensed as trepidation from the audience, about seeing a respected speaker in a vulnerable state) left a mark on me.
He was right: software security nowadays is a swiss-cheese mess, and the industry isn't addressing it.
His speech instructed me and perhaps others in the audience to deal with that new reality and adjust to it. It's tough for the original hacker / cypherpunk / purist mentality to adjust to. But it's where we are now, and it's a mindset that'll never die even if all of us that subscribe to it do.
RIP Dan.