I've seen to many companies call things "open", when they are decidedly not "open" — Google's Android comes to mind, or OpenAI. I don't see an RFC defining tha

I've seen to many companies call things "open", when they are decidedly not "open" — Google's Android comes to mind, or OpenAI. I don't see an RFC defining that "cross-vendor E2E email encryption" as a standard, so calling it "cross-vendor" is just fluff at this point.