We keep seeing this assertion that "yesterday's paradigms" "don't fit" in todays marketplace. The Vandersteen and Magnepan "paradigm" is just as valid as it was before the mythical "low mass" revolution didn't happen. That's just a bumper sticker slogan, meaning nothing. We are being asked to believe that people who don't care enough about sound to buy Vandersteen or Magnepan (or Eminent Technology, or Tekton, or any other good HEA loudspeaker) ARE interested in a loudspeaker which can be tuned. Yeah, sure. This "new" consumer, today's "paradigm", doesn't sit and listen to music critically, and doesn't care about non-tunable loudspeakers, let alone tunable ones.
Question: What makes any of the above loudspeakers "high mass"? In what sense? The drivers in ESL and magnetic-planar loudspeakers, and the driver's support structures, are lower in mass than the dynamic drivers and their "tunable" enclosures, are they not? So are the excellent Vandersteen Balsa Wood-structure drivers, and the "enclosures" they are mounted in.
"Tune" a loudspeaker to do what? Allow more resonance? Great idea! Musical instruments are tunable for a very good reason---they play notes. The notes are either correct (in tune), or they are not (out of tune). A loudspeaker cannot be "tuned" to achieve an isolated, desired effect, unless the loudspeaker was designed without a target objective. Is reproduced sound now suddenly a purely subjective matter? "Tune" a loudspeaker to play a certain recording "better"? And retune it for another recording? Good luck selling that to the "new paradigm" consumer, whoever that mythical creature is.