I read all these threads about coins becoming officially dead. However, most of these threads are FUD. When does a coin become official dead? Is it when the developer stops developing? Is it when the coin stops trading on major exchanges?
It is when there isn't a single exchange that will trade the coin. It means you can't use it to do anything, not even convert it to bitcoin. At that point it is dead.
If no-one mines it, it is dead too - if you can't get transactions confirmed, then it's dead.