AH, Vacuum bits...
As vacuums are my specialty, I have a few of the oddball ones.
Kirby's oddball bits are actually better than most, their drills/grinders/whatever ran via a drive belt off the main shaft; the drill was the flexible shaft kind and these are very useful to the craftsman indeed; the grinder worked adequately and all of these that fell under the "Handi-Butler Group" were more than enough for the casual use of such an item for the "Gee, if only I had a [TOOL]" type of use. The paint sprayer was relatively useless (it was poorly made and doubled as the suds maker, which worked well enough but was a rather "why bother" item) especially as you could only use it with watered-down non-oil-based paint. In the 80s with the Heritage they had a sander/scrubber/massager item that was a good sander (it picked up its own dust!) adequate massager, and poor scrubber (though better than doing it by hand). This was part of the "Turb Group" that included what has to be the best turbo brush ever made; an unique one with a brush roll; much better than the horrible "Zip Brush" that came later.
Filter Queen was another that had a hair dryer; the problem with these is obvious and already stated. Plus, who the hell would drag out a 30 pound vacuum just to blow-dry their hair?
Eurekas had a sort of low-rent power nozel called a "Vibra beat" that just made a lot of noise while doing a whole lot of nothing. All sorts of gimmick nozels have come and gone, and continue to. (although the Hoover nozels with the rubber nubs worked well while they lived).