You can access data from deleted forks, deleted repositories and even private repositories on GitHub. And it is available forever. This is known by GitHub, and intentionally designed that way.
I’d guess because the same argument could be made for the website you’re on right now. Why use that when we could just use mailing lists instead?
More specifically: Sure, Git is decentral at its core, but all the tooling that has been built around it, like issue tracking, is not. Suggesting to go back to email, even if some projects still use it, isn’t the way to go forward.
Considering that git doesn’t need federation, and email is the grandfather of federation, sourcehut has a working version of it this very moment.
Why the downvotes?
I’d guess because the same argument could be made for the website you’re on right now. Why use that when we could just use mailing lists instead?
More specifically: Sure, Git is decentral at its core, but all the tooling that has been built around it, like issue tracking, is not. Suggesting to go back to email, even if some projects still use it, isn’t the way to go forward.