Since you're here, I really dislike the opening paragraph:

>Suppose you had two choices when chatting with your friends. The first will give you a great messaging experience, but you’ll need to sign up for a new app to get it.

The problem is, that totally misses the actual friction point. It's not just that YOU have to do this, but so would ALL of your friends. Given how salient the rest of the post is, I'm certain this was intentional, and so it turns me off as a reader immediately because you are opening with something so disingenuous.