Fair point to make, but I don't agree that it won't happen any faster. The process of switching between accounts involves the user manually entering secure credentials. For me, this involves switching apps, opening Lastpass (which, as it happens, is faster now that it uses touch ID), searching & retrieving my other Evernote details, copying my user ID and password via the clipboard and switching back to Evernote, and then entering the credentials via paste. I may possibly recall my user ID, but the password is secure and unmemorable. If I'm on the move or right in the middle of other activities (i.e. that's why I'm using my mobile device), this is a clumsy manoeuvre and prone to manual error; it certainly takes longer than triggering a 'one-touch' securely stored alternative set of login credentials would do, even if the round trip database switch takes the same time. Improving the mobile UX process even without vastly speeding the activity would be a significant gain.
