You are forgetting that most business' needs are extremely minimal. By volume there are more bakeries, bars, gyms, one man doctor's offices, little car dealerships, hair salons than businesses that have actual IT needs. And for those businesses a dream router is fine if not a bit overkill.
Every small business within driving distance of me seems to have Ubiquiti WiFi on their walls/ceilings. Seriously, in the businesses where they provide free customer wifi these things are everywhere.
