They could have added namespaces to branch names. Right now branch names are just a free-for-all. Instead, if they insisted that branch names are always prefixe

They could have added namespaces to branch names. Right now branch names are just a free-for-all. Instead, if they insisted that branch names are always prefixed with "username/", then you wouldn't need forks and anybody could freely submit code to any project. PRs would become MRs. I believe this is how most Git repos are managed within organizations. I'm not sure why public repos need to require users to fork things to propose changes. And isn't this basically how Github works internally anyways? (eg https://news.ycombinator.com/item?id=24882921 https://news.ycombinator.com/item?id=24882921)