One important design feature of a vacuum cleaner that has not been documented yet is the belt. Basically, the belt is the heart of a vacuum as it runs the brush roll and powers the vacuum essentially. Without this integration, a vacuum would be useless at sucking up the “not so easy” dirt and debris and because of this, it is essential to replace it when the time comes. Yet, the average consumer is probably not going to know how to check it for damage and potential issues.
However, it is not as convoluted as you may believe. As long as you periodically monitor the agitator belt for general wear and tear, you should be fine. If you notice some serious signs of wear, get ahold of the manufacturer so you can receive the correct replacement belt.