Visual Studio templates

All of a sudden my Visual Studio 2008 started saying that no templates for either project or items were installed. The fix was rather simple, I found it after some googling. Check out
http://forums.asp.net/t/1250064.aspx, or http://blog.laksha.net/2008/09/no-visual-studio-template-information.html

1. Open up the Visual Studio 2008 Command Prompt
2. run devenv /installvstemplates
3. Go get coffee, wait a while and then they are back.

The big question is of course, why did they disapear?