I've used lotd at work for more than a decade at work and at home. A lot of stuff I do at work (when I'm not being a PHB) I either couldn't do at all on Winders or would be extremely more complicated to do on Winders - and likely one metric crapload less stable. I haven't used Winders at home since since the late 1990's with the exception of running VMware to host a toy operating system (read: Windows) when I was making a living as an MCSD. Are there things that we use Windows for at work? Absolutely. You're not really going to get good support for SAP Business Objects on Linux and our purchased accounting system requires MS Sql Server, which, of course, you're not going to run on a non-Redmond OS. Then, too, there's our legacy applications, MS Exchange and BES (yes, we're still using those).

I've always been a fan of running whatever operating system fits best. Saying lotd doesn't have a place misses the mark. It depends on what you need to do.

I've never looked for an "omg I must have that" feature of an operating system. My operating system should run, reliably, be as secure as it can be without making me cut performance by a third so I can pay somebody else for add-on software to keep my mail client from sending kiddie porn all over the world and just plain stay out of the way so I can get some real work done with my machine. I don't use these things for fun.