Are that many chips actually affected (AFAIK it's only consumer desktop CPUs which is a niche market)? They also seemingly changed their warranty policy, so unless the melting CPU caused additional damage what would they be sued over?
Given the confusing messaging from Intel on this, my personal guidance is to assume all Intel CPUs are affected from the prior few generations. Based on the lack of coherent messaging from Intel internal QA is either non-existent or simply ignored, so it seems likely Intel doesn't really know what product has been affected.
Level 1 Tech Wendell implied that it’s been seen in server cpus as well but seems less likely as Max TDP is more controlled so max current damage seems less likely.