For security and stability, it beats Windows 9x all to heck. In the business world, Microsoft Office is the runaway standard. Any situation where Linux makes sense, I try hard to persuade the decisionmakers to adopt it. StarOffice and Applixware are very nice, and Corel's WordPerfect Office 2000 also has a Linux edition. Yes, there are Windows emulators that allow Windows apps to run on Linux.
Dependability varies wildly.
Okay, I've turned on the charm and feminine wiles, and cheapskate boss is nodding in agreement. Windows NT makes sense. More cost up-front, saves much money over the long haul. Let's put it on all of our ancient 486s. When I finally stop laughing and regain some control, I figure out an upgrade schedule.