Because FOX wanted to cash in on the fact that it was the 20th anniversary of The Simpsons and it was the first season in HD, which is why it was a bare bones release, no special features or commentaries.
November 6, 2012
August 24, 2010
Yes, although it should be noted that Season 21 will never be released on DVD. The sets were discontinued in April 2015.It will eventually be released as a digital download. As of June 2015, the release date is unknown.
The eleventh season was released on DVD on 5th November 2008.
Kang
The first season of The Simpsons on DVD can be purchased from media stores and online from merchants such as Amazon. Used book stores may carry a secondhand copy of the DVD set.
The eleventh season was released on DVD in the UK on 6th October 2008.
Krusty's Face
The Season One DVD or in syndication.
Ralph Wiggum
'Bart Wars' is not an episode of The Simpsons, it's a 112 minute DVD.
It was first broadcast on September 19, 1991. It was first released on DVD on the 26th of August, 2003.