I'd rather mark a function as "async" than to constantly do the mental gymnastics of whether a function is going to run synchronously or asynchronously, or even

I'd rather mark a function as "async" than to constantly do the mental gymnastics of whether a function is going to run synchronously or asynchronously, or even worse, always assuming that it'll run asynchronously and always have to deal with callbacks / triggers and the like just to get things to execute in order.