Another example of what I stated broadly in my review of the Legacy Audio i.V4 Ultra (class D) Amp review; the other classes are dead, defeated. The discrepancies in sound quality have been addressed through improvement of class D and now it is the ascendant class of amplification.
I have no direct experinece with the VTV Purifi amp, nor association with it. It's simply obvious to me how the class D is emerging as newly dominant. In a few years you won't be able to give away your tube and other SS amps. Deniers will pay big time as they see their beloved amp's value fall to near zero.
Amp makers that do not pivot quickly will become defunct. It won't be pretty. I have other inside info that confirms what I have been saying. We're seing an amp revolution (not evolution, that's a stupid concept when applied to products which are developed) happening right now. :)