I don't understand, are you saying async is hard or that a poor implementation is a source of issues (e.g. async function that calls sync primitives)? Because I

I don't understand, are you saying async is hard or that a poor implementation is a source of issues (e.g. async function that calls sync primitives)? Because I totally agree with the latter but I have no idea what "hard" means. Very little changes in terms of syntax (assuming support for async/await ops) or reasoning.