“Zero day” has meant different things over the years, but for the last couple-ish decades it’s meant “the number of days that the vendor has had to fix them” AKA “newly-known”.
Old-timers, at this point, but I take your point. I guess, for that matter, the terms "social engineering" (as it relates to manipulating people into divulging secrets, etc) and "doxxing" both came from the same community, too. How bizarre. Terms that were bandied about by kids in text files became actual industry jargon (and, in the case of "doxxing", arguably mainstream).
Right, I think the use of "0-day" as "stolen, unreleased software by software pirates" predates the current use.
The other commenter is right, there's a lot of overlap in the communities. It's strange to me that I was in the "field" a good 20 years before I ever thought it would be a career opportunity. This is not a complaint by any means. :-)
