I've gotten a fair amount of side work in the last 20-odd years, largely because most of my admin and programming skill set is antique. Setting up printers on Microsoft Xenix? Updating a business inventory system that was written in BASIC? Making serial cables to hook up old industrial equipment to new controllers?

Lots of C# and Haskell wonks around here, but none of them want to dirty their fingers doing maintenance work, particularly maintenance work on software written in no-longer-fashionable languages before they were born.