@machty — I should have followed up on this thread myself. I cannot express how excited I am about ember-concurrency now since the latest version landed. (Currently in the midst of refactoring so so many things to using it).
As a consumer of open source and a somewhat-infrequent-contributor-and-not-proud-about-it, thank you. (Not sure I ever expressed a thank you when you delivered the async router three years ago too ;-)).