I can see why westoids are malding at the shiunji collab (kek).
But why the fuck are they malding at Fruits Zipper?
First, their audience have more females than D4DJ (And LL with Bandori combined) audience in Japan. And westoids have been crying D4D is fod the girls and shits. So now more girls will play Groovy Mix even if it is to try out.
Lastly, even from Bushi days, Groovy Mix is build to work with collaborations over solo content.