My current server runs 40ish docker containers and has 24TB of disk space in a ZFS array.
It is a 11 year old Intel chip and mobo that was my desktop once upon a time. I have been thinking about updating it simply because of power draw, but it works just fine.
I did add in PCI risor boards to get PCI 3.0 NVME drives in there.
It's pretty common practice to upgrade your computer and turn your old one into a server. Then continue that cycle every upgrade.