Besides, a number of forks have had a positive effect on the original project: Emacs, GCC, GNU libc, Vim, probably more.
GCC had a standard to live up to (and it extended that standard in plenty of ways), the others aren't languages per se and do not and never did have the mission to appeal to the people that write non-sexy system software for a living. They value stability and a lack of drama in the suppliers of their tools above all else because any kind of fragmentation has the potential to cause them to have to (much) more work and they usually already have plenty of that.
Which, to me, makes it seem that "hey, don't fork the community" is kinda brutally missing the point at hand, or at least feels aimed in the wrong direction.
Competition if anything breeds more innovation.
I wish someone came up, e.g., with an Elm fork.
All this drama and the fork likely seem extremely important to the parties involved but everyone else just wishes they would get along.
As a working dev I want one Rust.
...You know?