"Async void methods will crash the process if an exception is thrown"

This is news to me. AFAIK one of the problems is that exceptions in that method will go unnoticed because they never reach the root thread when they occur. They might only become visible, wrapped in an UnobservedTaskException, when the process shuts down.

Edit: Maybe the author meant that the unhandled exception will cause an invalid system state and thus cause other exceptions? Or maybe I'm just completely wrong here.