My brother is a head golf professional and he switched club brands because he wasn't a fan of how his rep at the time was treating him.
Could there have been some Matt and Tama drama? Yes. Do we need to know the specifics? no.
We do commercial casework at my job and sometimes we resort to residential casework in favor for good clients. Residential is essential a buy out for us because we don't manufacture face frame boxes.
Anywho, one brand we always pushed because it was sought as better than the other. Now their lead times at 2x as much as the other brand. Their quality had also been in question these past few years.
The other brand, their flag ship top tier stuff, is quite comparable to brand one. In fact, quoting their top tier box yields better construction as the other brands entry to mid level box.
Sure, the other brand doesn't have as many customization whozeitwhatsis but they do offer a good, solid, quality box, at HALF the lead time as the first brand.
I even bought the other brand for my kitchen because I need this kitchen to be done before Xmas and the rep is just easier to work with.
So, coming back to drumming here. Tama makes superior quality products, DW makes superior quality products. Maybe one contract ended, maybe there was some tension with reps vs. artists. Maybe, just MAYBE, its a preference?
I personally 4 different drum manufacturers for all four of my kits. All for different reasons, I'm not a pro drummer, but some things I like here and there than others.
Matt going to DW is not a big deal at all. In fact, I spent more time on this post than its worth and that is a bigger problem.
Cheers.