There are a few reasons why this might be the case:
* Licensing and Distribution Rights: The rights to distribute a show on DVD can be complex and involve multiple parties, including the studio, actors, and other stakeholders. It's possible that agreements couldn't be reached for a DVD release.
* Popularity and Demand: While "One on One" was a successful show, it may not have generated enough demand for a DVD release.
* Streaming Availability: With the rise of streaming services, studios may be focusing on making content available through those platforms rather than traditional DVD releases.
If you're looking to watch "One on One," your best bet would be to check streaming services like Hulu, Amazon Prime Video, or Netflix to see if it's available for viewing.