Well then the Masses must be telling you somthing
For your avarage home owner vacuuming is a chore not something fun to do.
I would be interested to know how many of those here on Vacland who reponded have Kids, Ie under 17 years old.
When I was single and even before Joanne and I had kids , life was busy , I thought it was atleast but it was not. Been a petrol head I had time to wash and detail both our cars, do all maintanatce myself, I had a fantastic garden that I tended to myself, Grass cut every week, never a blade out of place. My vacuum collection was up to date, in perfect condition , I used a Kirby because it was the best I had at that time, I could spend the time it took to clean each room disasembeling half the machine every few minutes to fit the attachments.
Then we had Joshua , The kirby was quickly replaced by a Hoover elite and then a Electrolux widetrack, I no longer had the time to spend a hour just vacuuming every day. The garden while still neat was no longer the masterpiece it once was, The cars get washed when dirty , the maintenance is done by the workshop now.
My point is that as someone who lives in the world of Kids, Homework assignments, and all that goes with that, like the rest of the masses Air flow means nothing if I dont have the time to use it.A average vacuum does a good enough job for the masses.
Its one thing that most vacuum collectors fail to see, yes Kirby is has great airflow, Yes it will last a life time ( most of the time ) but it will lats even longer in your average household because after the novelty wears off it either ends up in the cupboard or on Craigslist and Ebay when its replaced with a Eureka that is easier to use, Or even worse the carpets get ripped up and hardfloors replace them because they are easier to manage