[chirp_users] Why Isn't Chirp In The Main Repository Of Linux Distros?

Hi, I've added the DanSmith repository enough times now that I can do it without looking for the exact syntax. But I keep wondering why Chirp is not in all Linux stable repositories. I mean that if I want something like speech-dispatcher, I don't need to add a repository to get it. As popular as Chirp is, can't it just be in all Linux repositories? Thanks for any info, I have been web searching for an explanation as to why this is in general, but I have only gotten a history of repositories without really explaining an answer to my question.

Glenn