Nowadays, these code forges have also become a centralized place for issue tracking, kanban boards, wiki editing and, specially, as CI/CD servers, in the case of GitHub Actions, which are, sometimes, the only for you to deploy software to package repositories. The same limitations apply to GitLab CI or Codeberg's Forgejo Runners/Woodpecker.

Whenever GitLab, Codeberg, BitBucket and, mostly, GitHub goes down, a lot of the software and websites you use can't be updated, including dependencies of your software that you're pulling from npm, for instance.

Finally, companies use code forges mostly for the ease of doing code reviews through Pull Requests/Merge Requests. Developers rarely, if ever, actually merge branches locally, before having it reviewed by peers in one of these code forges.