Hey, enjoyed this podcast. And the reasons for not using Windows still stand true today. - With about 3+ er, 4 years of playing with Linux and variations of Ubuntu, I too, don't see a reason to use something else. There are only a few programs out there that I might wish to use from time to time, but that's due to wanting to connect to others on a Windows Platform... 
I.E. Silverlight and Netfiks, and  Webinar's that use Go To Meeting... 

Randy