Let the complaining of “My eBay parts ruined my phone” and blaming Apple for it start.
I’m a former repairman and I can 100% certify you have no idea what you’re talking about.
We could buy all non-paired ICs from China and keep phones alive. Parts were not always reliable, that’s why we had warranty. We could save phones that were absolutely not worthy of a motherboard swap.
If the modem IC was broken, the phone was unrepairable. Done. No solution. This is ridiculous.
People can already repair iPhones with third party parts. I’ve heard none of my hundreds of customers blame Apple for a faulty cheap LCD they got somewhere else. They blame whoever sold them the part. How is this not obvious to you?
From a technical point of view, you know nothing. From a human point of view… would you give up the possibility to repair all things because people may complain about it?
Edit:
Also, we know very well that those parts can be reliably swapped because they are very often removed and put back on for other reasons like repairing tracks underneath.
Also Apple could just give people who do soldering the ICs if third party ones are a problem to you.
Their “right to repair” compliance is greedy corporate BS.
Edit 2
I focused on motherboard IC pairing and didn’t mention there’s one more big thing you ignore: other parts with paired ICs are already swapped with third party components in many cases, but you have to transfer the IC, a soldering operation that’s pricey, time consuming (hence pricier, work costs) and risky (hence more pricier since components may be wasted).
So, if something is making third party components pricier and less reliable, it’s Apple’s policy.