Price and power.
Currently, I would need to add another two 20A lines to just be able to run the speakers and my Submersive without tripping the breaker. The cost adds up per speaker, and I just don't need all that power. I prefer active crossovers with dsp like this, but I just can't afford it. With that said, I love my Submersive.
The Noesis is a highly efficient speaker that can run just fine off any decent avr. I would save a few thousand going that route if I ever do.
Plus, you can only gush over your system for so long. It's almost a good thing that the thread is quiet, it means everyone is happy with their purchases, and hasn't had any issues.