Is it a joke? GitHub is not perfect, but it is mostly free and survives billions of commits every day. You don’t think We are all able to scale a service so well.
I don’t know, I love it. There are many alternatives like bitbucket, gitlab, but GitHub is still better overall.
I use Github as well and yes it has been down sometimes, but Gitlab has outages too. For me Github is still in good territory and would have to get a lot worse for me to even think about moving off. Gitlab is basically better, but it's not better enough to suffer a migration.
I don’t know, I love it. There are many alternatives like bitbucket, gitlab, but GitHub is still better overall.