A few companies like IKEA and Indian Railways, as well as a bunch of healthcare companies. As for why, because it works really well. It's not new and shiny but

A few companies like IKEA and Indian Railways, as well as a bunch of healthcare companies. As for why, because it works really well. It's not new and shiny but it doesn't break, it's fast, and it has a lot of nice features that still aren't common (clustering and RMS being the two big ones).