@stefano What exactly are you trying to do when you refer to 'old tech'? Is it for sustainability, saving resources or more like the #permacomputing culture, which most of the time wants to explore what would be possible?
My motiviation is mostly 'sustainablity', e.g. using old cheap routers from ebay as #OpenWRT-Devices serving DNS, DHCP. BUT ONLY when they don't consume a lot of energy.
This is a stop sign for me: Running old hardware that consumes 3 times more electricity while being 10 times less powerful than a modern device.