DJ mode seems useless for DJ’s and smells like feature creep. KISS, YAGNI.

It’s actually extremely useful for DJ’s listening to their music collection. I always miss being able to adjust the bpm when listening to some of my songs that I always play a lot faster or slower than they’re produced.

I personally own a bunch of vinyl records and love to change pitch while listening to get a different feel for the familiar music. DJs used to mix with turntables that have only pitch and phase adjustments, it was very minimal.