There are probably many reasons to consider why a studio is afraid to commit to, or cancel a series. Here are a few things I can think of: 1. Big Studios expect big profit. Example: Lets say Lions Gate's Moonlighting seasons 1 and 2 sells 30,000 units and is considered a success. Paramount's release of Happy Days season 1 sells the same number of units, but is considered a failure because the bigger the studio, a larger profit is to be expected. 2. Studios afraid of the music rights. If they have to pay for it, or substitute certain music in a series, studios are in general stuck between a rock and a hard place. Upset the series purists, or pay big money for the song. 3. Strategic release dates. With so much to choose from each Tuesday, studios have to find a way to fit in a release date that will gurantee strong sales in the first week of release. We all know what "heavy" release days are like. Choosing your favorite show on dvd, when there are 2 others you want being released the same day is the nail in the coffin for some series. Much like theatrical releases, tv on dvd releases see their strongest sales the first week of release. Just some thoughts on the matter. Anyone else have an idea or 2 about this?