From a security and coding POV, you may be right @PinkElephant, and you’re no doubt much more of an expert than I. But from a user experience POV, it would be wonderful, and I don’t believe the purpose of this forum is to nix ideas. Is it not to raise user needs?
In any case, the notes and the login passwords need not be integrated in any way other than them being accessible in the same app. In fact, that’s not even a big deal. Perhaps simply having separate apps covered by the same monthly plan may suffice.
In any case, will leave this with the Evernote Product team to assess