Drop support for older hardware meaning "we will no longer be providing feature updates or enhancements to your legacy system"? sure. Drop support for older hardware meaning "existing features you paid for will cease to function unless you give us $2500"? Not a chance. Possible exception to this would be where a third party could be blamed - for example ATT shutting down their 3G network, Google shutting down their maps service, etc. But I see no plausible scenario where they do something like this without having someone else to blame for it.