This exactly. If you already have Pis they are still great. Back when they were $35 it was a pretty good value proposition with none of the power or space requirements of a full size x86 PC. But for $80-$100 it’s really only worth it if you actually need something small, or if you plan to actually use the gpio pins for a project.
If you’re just hosting software a several year old used desktop will outperform it significantly and cost about the same.