Has anyone switched from Class AB/A to Class D? Was it better? Was it worse?

I can understand the attraction from A/b or even A if current is a problem to a class D amp.  But tubes are not something I hear and can easily go to a class D system unless heat or space is the consideration.  A preference for tubes is in a class by itself.  The differences are easily distinguishable in a blind test.  SS v tubes, if you enjoy tubes; my advice is don’t even bother, over time you will be sorry, have spent more money, just to go back to the sound you like, tubes.  
 

In 10 years, as Ralph says….then maybe? 

Thank you Ralph for your thoughts.  I can see your points, they are best to be considered .  Atma-Sphere systems at home can be somewhat problematic especially if not placed in dedicated audio rooms, the heat alone and then to a lesser degree, pocket $ impacting tube replacements for those hi powered OTLs can have us second guessing one’s financial priorities.  In an open air environment, they are some of the best I’ve heard! 

I might think about this further the next time I buy an octet of KT150s.  😵‍💫😵‍💫