Absolutely. I used to use hungarian notation in a static language because I was so scared of getting the wrong type. It was a huge revelation that actually this never happens.

However, whilst I never hit on basic type errors such as passing a string when I need an int - I regularly come across object type errors. I'll pass an object with a project_id property to a method that actually expects an id property. Not sure if flow can handle these - if it could it would be pretty amazing.