So people suggest moving to gitlab, what about bitbucket? it also offers free repositories. What makes Gitlab better. Ultimately centralising all the opensource

So people suggest moving to gitlab, what about bitbucket? it also offers free repositories. What makes Gitlab better. Ultimately centralising all the opensource in one service is a bad thing for opensource in general. Github shouldn't become the "defacto" custodian of opensource projects. It's like today the internet is "distributed but heavily centralized in one place". Look at the S3 outage recently, taking down half the internet.