An idea; Coroutines

[Stefan Koch]

On Tuesday, 16 January 2024 at 14:20:41 UTC, Richard (Rikki) 
Andrew Cattermole wrote:
> Coroutines! Oh coroutines.
>
> Recently Walter has shown some interest in me describing my 
> library implementation thereof, due to my belief that they 
> should be used for asynchronous tasks and hence need to be part 
> of the language.
>
> [...]

We have fibers in the runtime; why would we need the coroutines 
you propose and what's the difference to the fibers we already 
have?