FYI, the reason that additional seasons of shows like Murphy Brown, Designing Women, Cagney & Lacey etc. have not been released is because of the music that is held within the series. Every single piece of music used on each episode has to be released or a deal regarding release must be reached or they can't release the episode. It is not exactly like they can go back and recut the episode. So goes the tangle of intellectual property. Sometimes it is very self defeating.
I notice it's not being held up on Friends (that screwy teen age series) or Seinfeld or even Curb Your Enthusiasm, a relatively new series. Cheers is out, Andy Griffith is out, and finally Taxi is coming out and Bob Newhart. But not Murphy, which was probably the best of the series. And while were on the subject, Leave it to Beaver released only 2 DVD's and that was it, even though it's a real classic. Is anybody going to tell me that little ditty they played for the opening of LITB was so special? What is it? Not getting enough money, or is it that they don't want to pay the actors? (which is what I think is going on.) Those early actors made no money for all those shows that have been repeated over and over on TV and made a ton of money with their ads, but the actors got next to nothing. The TV industry should be ashamed.