It took me months before it sank in that Nodejs async wasn't really async as I knew it from Elixir -- there's an implicit queue, and no true suspension of the execution flow.
One justification for this was that it is supposed to make it easier to reason. It made it more difficult for me to reason -- maybe single-threaded async reactor is a poor substitute for immutability.
Unhandled promise rejection is an example of a consequence of this design. That's not really a thing in Elixir by design. But in the Nodejs world, people don't even see it as a design flaw. It makes reasoning about reliability much more difficult.
