Even if you don’t await anything async fns behave different. They will get compiled to a function which returns a Future. When you call the function - nothing h

Even if you don’t await anything async fns behave different. They will get compiled to a function which returns a Future. When you call the function - nothing happens. The body will only be executed when someone starts polling the Future. This will also have a big impact on all lifetimes - since they now get part of the returned Future type. Now would you tag something as async if not required? Likely not - it just makes things more complicated. One exception is when you expect you need to modify the body of the function in the Future to make use of await, and you want to maintain compatibility