The missing feature is federation! In my view, centralized structures like a giant source repository such as github are something we as a developer community need to avoid. Unfortunately, features like federated merge requests in gitlab ( https://gitlab.com/gitlab-org/gitlab/-/issues/14116 ) are something we've been waiting for for 9 years and nothing seems to be happening there. This feature alone would enable a lot of new collaboration without forcing everyone to work on a centralized system to use git - a decentralized versioning system - with high efficiency.
Last week, Microsoft cut off the email account of the chief prosecutor of the international criminal court, after being ordered to do so by the Trump administration. This is merely a week or two after Microsoft did a big PR campaign, telling the European Union how they were to stand up against this administration if the need arises. The irony!
Trump isn't hiding his opinion about the EU. What's stopping him from ordering Microsoft to block the EU from accessing github one day? Right now: Nothing at all. Think about how it would impact your business and open source software in general. We must not put all our eggs in a single basket.