Seriously, the chances that github just disappears off the map are about the same that the gitlab team decides to stop working on the OS product. Non-zero, but

Seriously, the chances that github just disappears off the map are about the same that the gitlab team decides to stop working on the OS product. Non-zero, but still low. However, the impact is only mediocre: It's simple to keep a copy of the repo around and just a simple to keep a copy of the wiki around: They're git repos too. The only thing you'd loose is the issue history and your network of clones. If that's what you're concerned about I'd be more afraid of your internal gitlab server crashing down in flames because somebody fat-fingered a critical update.