Yes, JS got it right. It is very often the case that you need to consider different edge cases for synchronous vs. asynchronous execution, and it's very hard to

Yes, JS got it right. It is very often the case that you need to consider different edge cases for synchronous vs. asynchronous execution, and it's very hard to cover both cases in tests, leading to code that randomly breaks in production based on timing differences, which is pretty much the worst.