Can’t speak for DaVinci. The question with any software is not is it the best, but what is everyone using? Because you don’t want to be in the sandbox playing alone.
Regarding Avid.
I find Avid clunky and use Premiere on short form, because the short pieces I do (trailers, spots and corporate) are graphic intensive.
Having said that, Avid is the only game in town for long form. And that has to do with it’s media management. A bin in Media Composer is also a folder on the hard drive. When you close a bin, Avid doesn’t think about that bin anymore until you open it again. Which means that you can have an insane amount of bins and media and work on a relatively slow computer. Not so with any other program. The bigger the project in PrP and FCP X, the more computing power it needs. In Avid when things start slowing down, close all the bins you don’t need.
Documentaries, reality shows and big budget features use a lot of media and have many sequences of various kinds. The need to share it with others, and they need to access everything. So Avid is king – for now.
Stephen Eckelberry