The higher profile (and potentially higher paying) jobs are mainly Avid due its success and longevity in the Hollywood studio and worldwide broadcast markets. But to say all jobs are Avid is not true.
FCP7 still has a little life in it, but I have not come across jobs requesting Sony Vegas, but does not mean they are not out there. Depending on which part of the country, which niche of the video industry you are interested in, then you will also find a lot of Adobe Premiere. There are even some broadcast networks adding Premiere Pro to the pipeline.
I recently did a search on the Film Industry job website for the Boston area:
https://www.filmindustrynetwork.biz/jobs
And these were my results for jobs
Adobe

Avid

FCP

So depending on where you live, where you are in your career path, and which part of the industry you want to be in, you will find different NLE’s being used. In today’s climate, you are better off being versed in several NLE’s and it is your creative editing skills that will keep you on a job.
Michael