Because GitHub is incredibly reliable, it'd take more than zero effort to move it, and I'd lose whatever small community I've already built up around it.
This is like asking "Why are you still using Facebook" and you'll get very similar answers.
This is like asking "Why are you still using Facebook" and you'll get very similar answers.
We've had more downtime with github than without. So I'd take the "reliable" with a grain of salt.