Technological irony

What do the following sites have in common?

 

 - https://www.linuxworldexpo.com/

 - https://www.macworldexpo.com/

 - https://lighthouse-partners.com/linux/home.htm

 

They're all running on Windows Server 2003:

 

https://news.netcraft.com/archives/2004/08/04/linuxworld_expo_site_powered_by_windows_server_2003.html

 

In all fairness, the sites are run by publisher IDG, not by the individual conferences, but it's still rather ironic.