Thanks to nexty for sending this in.
All good things must come to an end—and Windows NT is no exception. For at least the next year and a half, you can count on full support from Microsoft for Windows NT. After that, you"re pretty much on your own
Windows 2000 is shipping. Windows .NET server is in beta and should be shipping by the end of this year. Meanwhile, back in the corner of your server room, your Windows NT 4.0 server sits—humming happily, serving files, hosting Web sites, sending e-mail, and printing reports. What"s a network administrator to do? Upgrade to Windows 2000 immediately? Wait for .NET? Hold onto Windows NT until the server finally dies?
See the full atricle here.