I heard some at a show (Chesterfield?) many years ago. The fact I can still remember them, and what they sounded like, suggests there were very special. I had no need for a speaker of that type then (or now) but have always felt I'd like to own a pair.
The loudspeaker market is very saturated, and making something excellent is only part of the equation. I was involved in the design and development of some small standmount speakers in the early 80's - in fact I still have a pair of the prototypes, and they still strike me as pretty amazing, but, we couldn't get the production costs low enough to sell them for less than about £600, which put us in competition with much larger speakers, so they were difficult to sell to the dealers, let alone the public.