I think for brand new computers/builds that's correct but where it hit me was wanting to upgrade an existing desktop. I already have more DDR4 RAM than I need and would have been willing to purchase a new CPU/motherboard and being forced to also purchase new RAM at the same time made it too big of a price tag all at once. I just found the best zen 3 cpu I could on ebay and called it a day.

I think your point still stands overall for AMD's business though, I assume a vast majority of CPUs are purchased in new desktops?