The natural lifecycle of online communication services is that they burn out and get replaced rather rapidly. It seems as soon as one gets enough users to reach critical mass it is very hard to peel people away but inevitably when that happens the service stops investing in reliability, never mind new features, so maybe 5-10 years or so later people are saying: “I know you’re skeptical about trying new apps but this one really works, it is like Skype was 10 years ago…”

To look at Twitter in particular there are a lot of people who can’t seem to quit using it even when they know better.