Protesilaos is a legend and I agree with everything he's said on this post.
I myself put all my projects on GitHub because of visibility and the free CI to run tests on Windows/Mac/Linux which is a godsend... but I also normally keep an alternative upstream on all my projects with https://www.opencode.net (it's as easy to do that as adding a new remote with git) so I feel like I have zero dependency on MSFT, all the services they provide to me for free are just "nice-to-have" things. But they are very nice indeed.
The only danger I see is that GitHub becomes so widespread that other tools start only integrating with it (instead of using pure "git" integration). People are saying NPM already does this (I don't know, I don't do NPM)? That's a real danger, but hopefully other projects will have the common sense to not fall into this trap. For now, at least, I feel like that's not been a big problem.
I myself put all my projects on GitHub because of visibility and the free CI to run tests on Windows/Mac/Linux which is a godsend... but I also normally keep an alternative upstream on all my projects with https://www.opencode.net (it's as easy to do that as adding a new remote with git) so I feel like I have zero dependency on MSFT, all the services they provide to me for free are just "nice-to-have" things. But they are very nice indeed.
The only danger I see is that GitHub becomes so widespread that other tools start only integrating with it (instead of using pure "git" integration). People are saying NPM already does this (I don't know, I don't do NPM)? That's a real danger, but hopefully other projects will have the common sense to not fall into this trap. For now, at least, I feel like that's not been a big problem.