Try building a modern looking website only for scrollbars to look like they are from 1990. They break immersion. Especially on artsy websites that try to immerse people.
This is like people who use synonyms prolifically, replacing all of their words so that lexical units do not repeat. It appears jarring and somewhat pretentious, past a certain point: readers will rarely notice the common UI paradigms which they have come to expect, but viewers assuredly become aware upon contradictory circumstances such as absence. Some feel these pseudo-minimalistic phenomena are grating. You intend greatness alongside immersion, however an effect most contrary may occur.
Art? Nah. (Maybe once.) Dead horse gimmick, now.