Being a Vim/Merlin user I normally just type `<Leader>t` to see the type of the value under the cursor (this maps to `:MerlinTypeOf` if I recall correctly).
What I do use type annotations for is debugging. If the compiler finds a type error, in some situations it helps adding type annotations to find where the actual error is.
What I do use type annotations for is debugging. If the compiler finds a type error, in some situations it helps adding type annotations to find where the actual error is.