To clarify on this statement: the perception of privacy is important to some people, regardless of if the implementation is secure and truly private. So the assertion that people are concerned with it still remains true.

If you think Snapchat is private, then it is already too late.

Snapchat is in no way private.

That in no way changes the fact that it is popular because consumers believe that it is. Consumers might not always be very bright when it comes to privacy and security, but the popularity of snapchat demonstrates that they do care.

That's not why it's popular today. It's popular because it's inconvenient to save messages, not because it's impossible. Nobody is under any illusion to the contrary.

Why do you think they want it to be inconvenient to save messages?

Privacy. They want those messages to be private.

Are you disagreeing with him? I'm pretty sure he's right. You can also be right, but it's hard to know because you seem to have put the least possible amount of effort into your comment.