Maybe he's just not that worried about setup times (bet he doesn't do many NH gigs!) and thinks that having his favorite Tones available worth the extra setup time?

Many of us still have some favorite dinosaurs that we have yet to hear bettered (without other disadvantages). My old K2500S still gets pride of place in my studio setup, despite being decades out of fashion! And Korg have long discontinued my old Triton...

But they both have sounds I love and use. I spent weeks fine tuning orchestral samples in the 2500 from a wide variety of sample libraries, and yes, while I could go to one of the top VSTi libraries, they still work fine, especially in small pop ensemble work (something that most VSTi orchestral libraries are a bit over the top for).

Most great players prefer familiarity over having the latest, greatest gear. After all, their greatness comes from what they PLAY, not how it sounds...