[majou]

You're mistaken; the iPhone 5s--10 years old come Autumn--received a security update on January 23rd (iOS 12.5.7).

As the first 64-bit phone and the first phone with a proper Secure Enclave (TPM+biometric auth) it's received a lot of love from Apple.

[onphonenow]

My father in his 70s has stuck with one of these old phones. I keep on expecting them to end security updates - no go. The idea that apple makes unrepairable throwaway phones makes me laugh. Easier to resell and easy to get fixed (I use applecare with no complaints)