This is such a big, important topic that surely not all tech firms have settled on the "open plan" which intuitively and in my experience is awful.

I think the breakthrough will come when workplace interiors get much more modular and flexible. I'm envisioning different teams getting to choose (within reason) what types of setups they would like from enclosed offices to bullpens to cubes to open desks.

And I can even see planned re-arrangements every 6 months or so to eliminate the moss.