Largely depends on your homelab. I'm currently in my homelab using a 3970X Threadripper 😉 But, I got that board/chip free after we did a client upgrade to the new Threadrippers, and there isn't a single amount of money I could save on energy to match that savings.
That said, think about what you need to use your homelab configuration for; I often find that the availability of RAM and total available cores. But I guess different needs matter too..
