One for me is the forms taught in martial arts. Think on the lines of a minute or so long sequence of moves that would never be used in a match/combat but they tend to flow together. A nice way to exclude the world for a minute of predictable peace.
Many places refer to secure email when they mean a portal that function is more like a private chat app. A lot of them are even sold as 'secure mail' but don't use anything resembling SMTP.
Instead you log into a page, and send a message to the specified recipient who might have an email style address on it, or maybe on the backend it uses their email system for authentication even.
The switch has been made