Can anyone actually share 1 - 3 examples where a hard fork of a living os project has actually succeeded ?
If AMZN couldnt make their fire whatever it was called fork of Android really grow, what chance has the community got ?
The big ones that come to mind that were not already mentioned are MySQL => MariaDB, XFree86 => X.org.
OwnCloud -> Nextcloud, OpenOffice -> LibreOffice, Elasicsearch -> OpenSearch, privacyIDEA -> eduMFA
386BSD -> FreeBSD
NetBSD -> OpenBSD
To some extent I would argue that Linux is a spiritual fork of Minix and Unix.
But I think it’s also worth pointing out that these were in vastly different times where a single person or a small group of people could maintain an OS. An OS or browser is vastly more complex now.