Not comparing them to bags. Comparing them to expense. A bagless vacuum, and a Dyson, is not free, as you claimed. You still have to buy parts for it all the time. Also if you cared about environmental awareness, you would not buy a vacuum that uses toxic batteries that cannot be replaced and require the entire vacuum to be thrown in a skip and pollute the landfills for 100's of years. HEPA bags also do not lose suction, and if some sub-$1,000 vacuum loses suction on a bag full of dog hair then you admit that that vacuum is just a pile of junk then, innit laddie?