Not popular enough that I've heard of them by name, but I also don't tend to dabble with rotors. I prefer my engine up front, and my wings to remain stationary to my person. Also, if you think fixed wing is expensive, wait until you see how much rotorcraft go for...

If you haven’t already heard of him, Peter Garrison’s Technicalities column in Flying Magazine is fascinating and always beautifully written. This is one of the planes he designed: https://en.m.wikipedia.org/wiki/Garrison_Melmoth_2?wprov=sft...

I don’t fly but my dad was a pilot, and he and I would sometimes visit Peter’s hangar at Whiteman airport while he was building Melmoth 2.