What I understand from the interview that the intellectual people podcast had with Bruno Putzeys (
https://www.audiosciencereview.com/...ellectual-people-podcast-bruno-putzeys.24138/) is that Bruno Putzeys doesn't see much improvement for the Purifi Audio products by switching to Gallium Nitride, he states that the use of Gallium Nitride don't improve (much) the current product. He expects more from Silicon Carbide MosFets in the future, especially for high power amplification (he mentions 10kW).
So Purifi won't (probably) use GaN in their amplifiers, it will be interesting to see if other manufacturers will switch to GaN and if they can produce amplifiers with higher Sinad that can compete with Ncore and Purifi.