I'm gonna come out and say I love using Sony Vegas. I don't aim to exclusively do post-production, and if someone did, I would recommend AVID cause it's what the majority of studios use.
My personal gripe with AVID is navigating the timeline takes an eternity in contrast to Vegas which allows full mobility with the scroll wheel. Someone said you can change that in AVID's settings but I haven't seen that anywhere in the program.
A straight answer to what makes Vegas fall short in comparison to AVID from a workflow angle has never been given to me. The most common answer is "people don't use it" but I want to know how it technically falls short from someone who has legitimate experience with both Vegas and AVID.