I'm currently doing research into understanding why it is that certain effects are absent from various effect systems. Of particular importance to me is to be able to use asynchronous operations in my effectful code as many data sources can be used to fetch things concurrently, greatly improving performance. It appears that fused-effects is unable to support this in its current design. Since eff takes a fundamentally different approach with the GHC Primops proposal (great proposal btw), will this re-enable the ability to define asynchronous operations?

Related: are coroutines and asynchronous operations the same thing? I ask because coroutines are explicitly mentioned in the Delimited Continuations proposal as one of the motivating factors. To my uneducated self these seem like the same thing, but it is also tough to tell.