Olympics Moonlight Issue

I finally caught a screenshot of the warning message displayed when watching the Olympics with the Moonlight plugin:

To my knowledge, everything still worked with no problem.  The quality of the video was not the greatest, but I did not compare it to Windows/Silverlight.

This message just kind of irritated me a little.  Why should I be handicapped in watching the Olympics just because I choose to run Linux on my computer?  It seems to me that they should choose a little less propriety technology that might be implemented on a wider range of systems.  What about HTML5 or Flash?  Those seem to have pretty good support now across more platforms, don’t they?