A hoe is a very simple tool. You could say something equivalent of `cat`: the software is pretty much done, no need for particular maintenance, and it will work

A hoe is a very simple tool. You could say something equivalent of `cat`: the software is pretty much done, no need for particular maintenance, and it will work in 30 years time. If we still use UNIXes in 100 years time, I don't see `cat` failing either. You wouldn't say the same things about a tractor, or about, say, Firefox