[unfoldedCravat]

Not really relevant to cordless ones but I know Dyson removed their pre-motor filter on their latest corded vacuums. If the dust chamber is too full excess dust is blown through the motor and then stopped from coming out into the air by a post motor filter. This will lead to premature motor failure over time.

The Dyson 'bagless' idea is a bit of a sham. Yes they work, but they don't work that well. They don't make as much suction as their bagged competitors so they cheat and use smaller orifices to increase suction instead of by having a larger motor or alternative design. Then in order to have 'like new' performance all the time you have to continually wash (which doesn't really clean well enough) or replace filters.

Some people love them but they don't make sense to me. If I'm emptying my vacuum I'm going to empty it into a bag anyway so I may as well use a bagged vacuum that works more consistently and doesn't throw dust everywhere.

[mr-debil]

I love bagless, it is perfect for my use case. I have Huskies and fill up the canister multiple times per vacuuming of the house. The majority of my vacuuming is just picking up hair, not dirt. I'd fill bags up so quickly, and I've yet to find one that is replaceable as quick as a bagless canister can be emptied.

It's not a sham, different use cases call for different things.