They are both right.
Eno is correct that everything exists simultaneously now- but Gomes is talking about the mass market, the big bucks.
Where, in Eno land, there is now access to obscure 1970’s west african rock records that were only released in editions of 100, in Gomes land, only 1000 people worldwide actually bother to go to http://voodoofunk.blogspot.com/
and listen to those records.
The choices are certainly there.
But in reality, Lil Wayne sold 2.4 million copies of The Carter III, and the long tail didnt seem to impact that one bit- it was a classic 60’s style hit record (not in genre, obviously, but in market behavior)

Eno tends to live a bit above the pay grade of people who make NCIS the top show, and Taylor Swift go multiple platinum.