These rewrites in rust are merely just training exercises for those doing it. It wasn’t needed and in most cases isnt used.
Large parts of the rewrite came from contributors who had never worked on fish before.
That’s pretty useful alone.
And there’s this:
Thread Safety
Allowing background functions and concurrent functions has been a goal for many years. I have been nursing a long-lived branch which allows full threaded execution. But though the changes are small, I have been reluctant to propose them, because they will make reasoning about the shell internals too complex: it is difficult in C++ to check and enforce what crosses thread boundaries.
This is Rust’s bread and butter: we will encode thread requirements into our types, making it explicit and compiler-checked, via Send and Sync. Rust will allow turning on concurrent mode in a safe way, with a manageable increase in complexity, finally enabling this feature.
It was needed to safely further support for concurrent features? If they follow through on adding that support, there will likely be adoption.
The problem is in most cases the implementers stop at “same thing but in rust” without taking advantage of that.
I can’t fully blame them since just duplicating an existing thing is a huge undertaking.
Angry downvotes because people don’t like to hear that a meme language is a meme language.
Probably not “angry” downvotes. OP provided a link where it’s explained exactly why the switch was made. Even if you don’t care for Rust it’s pretty clear that this was done with more purpose than just “Ooo let’s make it in Rust for fun”
