Not to mention all the "open concepts" we’re seeing
Good luck finding a house built in the last 20 years in CA without an "open concept".
I prefer actual rooms -- I like being enclosed within a discreet spaces. My idea of a living room is not simply furniture grouped on an area rug, like an island floating within a large, undifferentiated space. The "open space" concept actually results in less useable spaces, whether one is an audiophile or not. Walls are good!
Ask a contractor about feng sui -- how it feels to be in a given space and most will laugh at you. As to why architects are so enamored of Open Plans, I have no idea. For better or for worse, it’s become the rule.