Note that they already do this if you buy a mac on an Apple Card, and they even go so far as to link your AppleID that you may have had for decades. I bought a new mac last year and signed up for the 0% Apple Card financing and if I'd have known about this little bit of leverage they use, I would have created a brand new AppleID to partition it off.
> If the contract is no longer in good standing, Apple’s system services can place the iPhone in “Restricted Mode,” which blocks access to most apps until the payment or contract issue is resolved, while keeping a small set of apps available.