I said “common”, not “universal”. I accept that there will be edge cases but that doesn’t mean it is an uncommon term. Though it does sound like you operate in

I said “common”, not “universal”. I accept that there will be edge cases but that doesn’t mean it is an uncommon term. Though it does sound like you operate in a different domain. I’ve generally heard the term in relation to sysadmin and related fields. While there’s nothing stopping an electrical engineer nor inventors from having a home lab I’ve generally heard them talk about their environment in more physical terms (eg soldering station) whereas a home lab (in computing context) is often just a rack in a cupboard. So it’s more of an ethereal space. This is all hugely generally speaking, of course. But it might go some what into explaining why you hadn’t heard of the term before.