Comment by geerlingguy

Just a nit; the mini rack has nothing to do with Pis per-se. One of the racks in the post features a Radxa N100 as the primary node, and other builds in the showcase feature various mini PCs (new and quite old). All of which have a lot more oomph than a Pi.

There are also other Arm SBCs that are much faster (and more efficient) than a Pi, like the Orange Pi 5 Max. Many homelab-related apps run just as well if not better on that, just have to make sure to settle on a supported OS distro.