Vacuums used to do what they claim, "clean carpets and bare floors." They were made of metal and had amazing vacuuming prowess—renowned for their durability. Today, it is a totally different story as the industry has evolved from floor-care to the floor-miscare business. The vacuum cleaner industry has drastically changed and you would think that with time, research, and development, this would spur innovations. Ideally, vacuums should progressively improve. Well, completely wrong. Nowadays, vacuums are made of plastic, everything goes through both the fan and motor. In the 21st century, if you pick-up a nickel, dime, sock or penny –BANG! Your hit with a costly repair. By the time you shut down the machine to examine the situation, damage is already done. You have two options (which I am sure you, the reader, never had to confront –right?)
1) Throw it away
2) Pay for a costly repair.
The cost of the repair is much greater than the purchase price of a new junky-vacuum. Warranties are not worth the paper they are written on (manufacturers warranty is against defects not against picking up something hidden under a bed like a sock). As a result, you just toss out the recently-bought vacuum and go to your nearest big-box store.
The bottom line is -
Poor vacuum cleaner construction with short life times ensue vacuum companies stay in a constant state of profit.