WordStar and Old Software Too Good to Stop Using

Should that matter? I don't think so . Not one bit. In fact, WordStar and DOS have a couple of advantages over more modern hardware and software: probably no Internet connection, no icons, nothing buzzing or beeping or flashing at you. In sum, the perfect environment for focusing on your writing. Judging by the success of GRRM's books, it's working!
What old software do you use? Which old technologies do you hang onto even as the rest of the world chases the newest update?
Pretty sweet looking old 8 bit machine. I could put one of these things in front of at least some of my staff and their productivity would rise, that's for sure. Screw always-on internet connections in modern offices: it's a joke. I'm posting this from work, for example, instead of actually doing my job :)
I heard somewhere about a guy running a database and his billing off a Commodore64. It was a small mechanic/garage or something, and the guy said, "it does what I need and there's no reason to change it." Awesome.