IMO, Brian’s genius was to the music of the 60s, what the Moog synthesizer was to the 70s.
He influenced the entire genre for a period of years and you can still hear it today.
That’s my opinion..
I think Brian Wilson, Pet Sounds and his influence are way overrated. Genius? Lot of hype. I like his stuff but it’s not even close to being in the same league as the Beatles.