It's safer to make changes, but you can't rapidly mess around with different structures without having to perform housekeeping on your types. This primarily app

It's safer to make changes, but you can't rapidly mess around with different structures without having to perform housekeeping on your types. This primarily applies to OO code, which is primarily where I draw my experience from - I find FP code is easier to refactor even with strong types because it doesn't enforce as rigid a structure.