Unfortunately, I do.

While I don't condone some of their business practices, and I think their legal stance on the UNIX/Linux issue is deplorable, the fact is their OpenServer (Hell of a name for a product made by a company that sues open source programmers) is a really good UNIX, and a lot of folks still use it.

I still use it on my business-critical backend servers, with a Windows-served front end and Win/Linux clients.