It’s truly a reference product for Martin Logan that doesn’t work for all listeners systems, like you stated mostly due to size and expense. I don’t think many would enjoy without a GREAT subwoofer setup in the system which adds to the overall expense! I feel extremely fortunate to have the space and I get to live with mine everyday. My opinion the ultimate electrostat speaker experience.My guess is that the CLX was discontinued due to the complexity and cost of the DualForce bass panel.
That cost along with the overall size of the unit, limits deployment options in many homes.
A shame, it's a beautiful speaker, and the DualForce elements were a significant advance in ESL tech.