Maybe it is obsolete, maybe it isn't, maybe my tin foil hat is firmly in place. But it just seems like a thing people like to say to almost make sure other people don't bother trying it or using it.
Maybe that's because it's difficult to use, maybe it's because it works and does do things securely and some people don't want that.
There's so many sophisticated TLA's out there influencing 'the conversation' that who knows what to think anymore.