The reports I had is that part of it is good and part of it irritating
Well I've had "reports" from people about movies or songs or cars which people have liked or disliked and I've always found that their "reports" often had nothing to do with my own subsequent "report".
Remember, a "report" is nothing more than a personal "opinion" and when it comes to myself I only decide something after researching or experiencing an issue personally.
But talking about stability, good to you if you can pay for tunings often, most of my customers prefer some maintenance and tunings less often. 6 months for the ones that play. A lot, but way less once the instrument is. Stable for many of them.
Considering that any piano in ET that gets somewhat out of tune is often further out than EBVT3 is from ET I don't see how any of this insinuation of a "lack of stability" is going to fly.
I may not be a professional piano tuner personally (although I regularly tuned my old Emerson upright myself) but I have taken several university Physics courses in Sound Theory so I am very much interested in experiencing something other than ET on my piano in order to see how it sits with my brain PERSONALLY.
Although my tuner prefers ET personally he has stated that he has absolutely no problem tuning it EBVT for me if I so wish.