Yes, Masso looks very cool, and I’m sure there are good reasons to make the move. I just don’t have them at this point, and am a little too cheap to upgrade just for the sake of it 
. Not looking to go ATC, don’t really see a big need for the feedrate override with mostly wood projects or the closed loop steppers either if feedrate is reasonable, etc.
I also like the spindle/VFD over Modbus connection with the BB controller which allows some back and forth communication, as well as the built-in remote viewing/program stopping/file loading over the internet. For quick moves the joystick is actually nice too, although the pendant would be a bit more precise. You can add proximity sensors for greater accuracy, play with the tool change program, have auto dust collection or laser air assist on the outputs, etc.That said, there are likely some other Masso features I’m not aware of.
Like @Echd mentioned, I’ve considered the z20 for the speed. Also, the 3rd rail/stiffy since @TMToronto showed a 25-45% reduction in deflection. Rotary is tempting. Has been done by some on the BB controller, but sounds much easier with the Masso.
I mostly just believe in everyone picking what’s best for their situation (and spending accordingly) rather than going off of 1-2 people’s (possibly biased or not fully informed) experiences.