I guess the reason is cost.  There are times I want to reinstall on older operating system, and Apple seems to go out of their way to make it difficult?  In some cases impossible.<p>Why not please your customers?  Give them what they want?  I don&#x27;t even think the average customer would need a TOS of all the negatives using an older operating system brings.<p>They have a huge war chest.  If a customer wants to be on the operating system that came on their device ten years ago; why make it difficult?<p>Could it be they want us to upgrade&#x2F;buy regularly?  For myself, I don&#x27;t think I will ever buy another new Apple product.  I will still give them as gifts though.