For the author, he misses an important point that except sometimes (and rare case) for a few core libs and functionality, majority zero-days and zero-clicks are based on new features and their integration into current OS iteration. Software revisions begets new security events. Patching software bugs/loophoples is not like treating cancer - something that has existed always and keeps popping up. It is new software added to old stack and made to gell with it. That 'gluing' process churns up new security issues.
If the phone is physically okay and you depend on few core functionalities, then it is perfectly okay to keep using it for majority of (non-critical) tasks. Most bugs in the system & features of old iOS are limited to that old OS anyway - and most likely addressed. If some advanced utility are going to be involved e.g. work communications, some security protocols, I'll perhaps work with a device which still gets critical updates at the least.
I have a iPhone 8 which I use just to Facetime my MIL and receive her iMessages (I am on Pixels since 2019). I can't foresee a old patched- often iOS with a older no-frills Facetime version to have a major risks. For these tasks, I don't see it necessary to get a new iphone.
If the phone is physically okay and you depend on few core functionalities, then it is perfectly okay to keep using it for majority of (non-critical) tasks. Most bugs in the system & features of old iOS are limited to that old OS anyway - and most likely addressed. If some advanced utility are going to be involved e.g. work communications, some security protocols, I'll perhaps work with a device which still gets critical updates at the least.
I have a iPhone 8 which I use just to Facetime my MIL and receive her iMessages (I am on Pixels since 2019). I can't foresee a old patched- often iOS with a older no-frills Facetime version to have a major risks. For these tasks, I don't see it necessary to get a new iphone.