GitHub before Microsoft?
IMO feature wise, GitHub really has improved tenfold. I remember having to fight third party CIs and project trackers, now we're running them all on GitHub and it's a well-integrated pleasure. If it does work, which it usually does and hopefully goes back to doing.
I also really enjoy their live vscode IDE, which lets you e.g. make small changes to PRs in a web vscode by pressing . on the PR page. This is different from their hosted VM offering and free, confusingly.