Yeah... this is what I was saying earlier. Look at (and please forgive me for using actual competitors product names here which I generally try to avoid) Cubase vs. Nuendo. You can get the top tier version of Cubase for a little more than you can get Sonar for and it, like Sonar Producer, is a full on professional audio production application. If you want the pro VIDEO stuff (and apparently some networking things that I don't really understand) you have to pay SIGNIFICANTLY more for Nuendo.
I have a family member who does video stuff (exclusively) and he has to pay through the nose for his stuff. Like WAY more than I do for my audio stuff. I've also worked (as a manual labor droog) at a film production company and the rigs and accompanying software they bought was just unfathomable amounts of money to a guy like me.
Personally I am ecstatic that I can purchase a pro software package like Sonar for almost half of what I could have bought an old Fostex/Tascam cassette based multitrack deck a mere 15-20 years ago that can do CRAPTON more and get FAR better results. Granted I have to provide my own interface and computer which can be quite costly if you want absolutely no barriers but with liberal use of resource saving features and techniques you can use the program no problem on a $300 computer through a $100-150 interface which would basically bring the price back up to what those old multitracks cost back then anyway (not even accounting for 20 years of inflation).
I also don't have to have a drumkit, tons of expensive mics, a special room to record in, a bunch of amps or even a herd of unreliable drunken musicians to babysit.
If I need to do video stuff... well I'll just have to either figure out a way to buy the right programs, use some of the freeware solutions or just admit to myself that perhaps video isn't my thing and get someone else to do the heavy lifting for me and use the tools I DO have to create my score.
As it stands I'm not even sure what kind of barriers even exist in this day and age in regards to splicing together video considering all the options out there that are free, come with any crummy little camera you buy or are just plain inexpensive enough to snag for a hundred bucks or so. I mean unless you need to create CGI stuff or have some weird high end demands all the cheap/free stuff works at the same resolution and file formats as the pro stuff so what's the difference? If the actual producer/editor isn't finished their job to the point of scoring the audio guy shouldn't even have the project yet or if they are just fleshing stuff out then you should be getting a revised final copy of the video to tighten up your part anyway.
So basically that's a really long, and perhaps douchey, way to say... Sonar isn't a video editor.