yoloing your way to a first prototype and aggressively refactoring along the way does make a lot of people very uncomfortable but it still produces better architectures than BDUF or even a scaled down BDUF (LDUF?).

it's really not generally appreciated just how much better architectural decisions made in the context of refactoring are. if you have a time budget for architecture it will always be better spent on refactoring than writing documents in advance, no matter how minimal they are.