yeah, i'd say both are quite on it!

largely down to manufacturers like Alembic, Ken Smith, Warwick, companies like that who started developing, or utilizing, new active pickups that pick up a much broader frequency spectrum. New amp technology definitely plays a part in this too with hi-fidelity bass amps and cabs representing this extended frequency spectrum.
Two really good examples of people who have what many people consider 'hi-fi' tone are Victor Wooten (everything including his YouTube videos, everything with a Fodera basically! although the sound of some of his particular basses I've read were actually loosely based on a Jazz bass..but anyway

) and Michael Manring as well, I'd say (EXTREME hi-fi in my opinion, although in a different way to Victor Wooten).