Yea me too but probably for another reason since I seen bagged ones too. Its probably because its cheaper to get one of those 40 dollars powerforces then buying something that is commercially approved and go though them when they break since they're so cheap to buy. Tells you about our throw away society.
Also I haven't seen a commercial hoover in a good while. You'll usually find the typical Sanitaire, Windsor, and Oreck in the wild then hoovers. I did see a hushtone in a bookstore once but I haven't seen a guardsman, conquest, or even those junk hushtone bagless "empower" since like mid 2000s. I use to see them alot especially guardsmens but not anymore. To my knowledge atleast.