Its no longer about trust but about making money.
Im going to use the words that Turbo500/Chris reiterates in another thread, here.
"...As collectors, over time, we all of course find out own preferences in things purely through using a shed load of different vacuums. A general consumer doesn't give a flying fig about brush rolls and motor noise and other things mentioned. A general consumer does not always enjoy vacuuming..."
Consumers aren't demanding for bagless vacuums either - its what the brands have coerced consumers into buying - same with food processors that years ago you could never place the same jug on the same motor where the main larger wide bowl goes for shredding cheese etc. As buyers we are made to feel that we have is insufficient and outdated - it goes with every kind of appliance, not just with vacuums. It's just that more so with floorcare brands who have now tapped into China as a resource that bagless vacuums and appliances are cheaper to produce than going "in-house" and creating an entirely new vacuum from the ground up. Oh yes, the U.S have superb in-house independent brands that offer a ton of bagged vacuums - but we in the UK have only had Kirby and Oreck from the U.S - we're not lucky enough to have Riccar and other brands.
In the UK, the major brands other than SEBO and Miele offer bagless and bagged vacuums, even if the bagged vacuums in terms of variety have fallen by the wayside. Brands no longer offer brand loyalty; that is clear from the lack of bagged vacuums with a variety of styles and more to do with trying to outdo the next rival by offering more flexible cyclonic bagless vacuums, not just by the look but by heaping free tools on etc as extra incentives or making outlandish claims such as "best selling," a sales phrase that Hoover Europe have continually promoted with their bagged Purepower upright.
The irony is that most consumers in the UK at least will keep buying Hoover's heavy and horrid Purepower upright because they will want the brand's past reputation in the present. They have no interest in a brush roll design, or how the dust is captured, or even the design process of the vacuum in general. Those after modern bagless design will try for Dyson if they can afford it and similarly, those captured by Kirby's selling skills for their uprights will also go for the Kirby if they can afford it. Those who can't afford it have plenty of brands and offerings to choose from.
End of the day, consumers aren't really being considered anymore - the aim from the brands is to make money and in the quickest way possible.
I'm thankful that Kirby still exists as a way of offering an alternative to the bagless army, though. We should be grateful enough that not every brand sells bagless cyclonic vacs exclusively.