A friend of mine still helps out a number of local businesses running their old MS-DOS Point Of Sales terminal software, as well as old high end printing hardwa

A friend of mine still helps out a number of local businesses running their old MS-DOS Point Of Sales terminal software, as well as old high end printing hardware at a print shop. It works, and replacements aren't worth the CapEx as they're doing just fine. Migration has real costs, like losing the customer database for a mechanic's garage or buying a new 6 digit printer for the print shop.