Let me just say I hope within the next 150 years, manufacturers will make vacuum cleaners that actually does what they say it will do.  I've bought so many, and the expensive ones are the worst.  I'm not kidding.  My most recent is a Shark Rocket with the "special brushes" that aren't supposed to let dog hair get wrapped around them.  I have to laugh.  It's worse than the others, lol, but it's okay except for that.