Unless you have the (ops) capacity to host it yourself reliably, chances are GitHub will be up more than your self-hosted solution.

As I'm typing this, I'm waiting for GitHub to recover so I can deploy an update to a rather important project for a big client. However, I'm happy it's their engineers to be scrambling to fix their git hosting, instead of me context switching from my work and rushing to duct-tape piece of plumbing I really don't care to think about.