As a business, your rights are more or less like "it should perform reasonably well" and everything else should be "reasonable". Otherwise, you sue. "Reasonably" being very subjective, but "The Purchaser is not entitled to refuse acceptance of the Products, withdraw, cancel or revoke the order or make claims for compensation due to any delayed delivery" is already very borderline (imagine they pulled a BFL?).
Exactly the law doesn't recognize such clauses because imagine how easy it would be to scam with the full protection of the law. Say KNC came out and said sorry due to unexpected delays we will not be shipping before Sept 2039 and due to our T&C you have no recourse. A sale occurs when the product is shipped and the customer has paid. Until then there is no sale just a sales order/contracts according to the UCC (which governs both business and consumer interstate sales contracts in the US). Almost every country has similar provisions for the same reason.
Imagine buying a house and then the contractor says "sorry your house won't be ready for another 382 years and you can't get a refund because we said we aren't responsible for delays.