Tl;dr: they’re switching from print to demand to limited print runs for Secret Lairs
I can’t see how this is good. The few times I’ve gotten a Secret Lair I found their shipping pretty quick, and limited print runs only encourage scalpers to buy out and jack up the prices. But I feel like Wizards is fine with that as long as it creates more FOMO.
With 4 years of sales data they can probably target there printing numbers close to their expected sales. Unless a Secret Lair is a surprise hit I don’t think this is that big a deal.