alt Hacker NewsBut this fragmentation is what needed to make good software. If you put things in the standard library you're just adding a +1 to the fragmented landscape because for instance it will never be specialized enough to cover all use cases, so people will still use their own libraries, just like for instance c++ has three dozen distinct implementations of hash maps just because one cannot fit all cases
It could also be argued that putting a specific executor model into the standard library will make the problem worse because it will give library crates license to use it without considering alternatives because it is standard. At least today taking a dependency on a specific runtime is a well-known boondoggle .