Do you know why it was rejected?
It’s been too long, I no longer recall specifics. Wikipedia links to the patch’s discussion on Google Groups, if you care to read it.
https://groups.google.com/g/vim_dev/c/65jjGqS1_VQ/m/fFiFrrIB...
Vim 8 did add support for asynchronous jobs, due to the pressure of Neovim fork.
https://lwn.net/Articles/713114/
https://news.ycombinator.com/item?id=7279358
alt Hacker News
It’s been too long, I no longer recall specifics. Wikipedia links to the patch’s discussion on Google Groups, if you care to read it.
https://groups.google.com/g/vim_dev/c/65jjGqS1_VQ/m/fFiFrrIB...
Vim 8 did add support for asynchronous jobs, due to the pressure of Neovim fork.
https://lwn.net/Articles/713114/