I believe, e.g. ZIO 2.next is doing something like this, dynamically deciding whether running something async or just doing the blocking thing depending on the availability of VThreads... but of course that's Scala, so YMMV.

Without a way to trampoline computation (or transform code appropriately) it's probably impractical to do anything like that.

(And of course, still many caveats as the sibling post points out.)