> It's really just an attempt to lock you into a proprietary system that you cannot export your data out of nor easily move off of down the road.
The GH API covers a lot of what `git` doesn't. GH's strategy has never been lock-in. They provide a good service that's constantly improving. (I'm sure other services have advantages and I'm in no way going to claim that GH is the best in class, but I am continually happy with GH and with its continued improvement.)
Liking GH and not (currently) wanting to move doesn't mean you're not locked in. Sure, it's possible to export your GH data and import it into something like GitLab or Bitbucket, but it's not exactly an easy process, and most orgs would think really hard before moving. It's definitely lock-in, regardless of whether or not it's a part of their strategy.
From MS's side, of course it's a lock-in strategy. The whole "MS for Startups" thing is a way to attract small companies to their platform and keep them there until they've grown to a point that switching away is more work than it's worth. Adding GH Enterprise to the offering just makes it more attractive.
The GH API covers a lot of what `git` doesn't. GH's strategy has never been lock-in. They provide a good service that's constantly improving. (I'm sure other services have advantages and I'm in no way going to claim that GH is the best in class, but I am continually happy with GH and with its continued improvement.)