How Is MQA Fareing?

 In another thread here are posters are making comments about MQA suggesting that it isn't a big commercial success, that is should be called DOA, etc.  Yet there are always announcements about companies adopting MQA, testimonials from happy Tidal streamers, etc.
  I'm neutral on MQA but having witnessed more than a few formats go down in flames in my time, and still puzzling over the resurgence of vinyl, I wonder how one measures the marketplace progress of MQA.  Do we look at Tidal subscriptions?  Sales of MQA compatible DACs?  The size of Bob Stuart's house?