Of course, but those would be features in the product code deployed on users' devices (one time investment), not a service that has ongoing costs of operation a

Of course, but those would be features in the product code deployed on users' devices (one time investment), not a service that has ongoing costs of operation associated with each call. They wouldn't just give this out for free (especially to older iPhones), it makes no business sense. If you're not paying for a product, you are the product!