The real game changer would be completed Federation[1] support. This is why I am donating both Forgejo[2] and Codeberg[3] and urge everyone doing the same, to give more time and resources for the Forgejo team to implement it properly.

Another good contender is the Radicle[4][5] which is completely decentralized on top of the Git.

[1] https://codeberg.org/forgejo-contrib/federation/src/branch/m...

[2] https://liberapay.com/forgejo

[3] https://donate.codeberg.org/

[4] https://radicle.dev/

[5] https://radicle.network/nodes/seed.radicle.dev