This is going to happen more often now
Well, in those days you had to provide cooling for the server. Nowdays, a RasPi, something running OpenWRT or MIPS Creator can happily live without any active cooling. So frankly, I would expect more of that in let's say 5 years time.
Buying a house from a geek? What controls the lights and central heating? Ooops, you may need to get that laminate flooring on the fist floor all up and replace it tracing cables because the fecking bastard has not left a cable map. Not to mention that there is no source either so you have no clue how it worked once you find that RasPi with a duff memory card somewhere in the ceiling void between the ground and the first floor which for reasons unknown to you happens to be under the floorboards in the toilet (Disclaimer - this is imagining what will happen if I sell my house :)