I'm not sure I understand, you said before you were prioritizing value and longevity. AM4 is the value king, and will last for many years into the future
AM4 is not longevity. Its last-gen technology. AM5 debuted 4 years ago. What "last" means to you obviously does not seem to be the same to me, because you seem to think it means "still functions", which the same could be said about a Commodore 64.
AM5 would only be a meaningful upgrade if you had fairly specific requirements
No one ever mentioned upgrading to AM5. This conversation was about AM6. Its about investing in a platform that has the potential to be upgraded 1 or 2 more times over the next 7-10 years instead of one that is already dead and can never be upgraded again.