I work in technical due diligence, mostly of mid stage companies getting bought by private equity, so typically revenue of a $5-100 million. (Which, by the way, is the most common exit for tech companies now by far.) Perhaps surprisingly to some, I see much more Angular than React, 3 to 4 times as much. I've been doing this job for 3 years now, and it has been very interesting to see the gap between what you read in the tech online blogosphere, etc, and what most companies that are quietly making lots of money do. Devs at small startups and big tech giants both write and talk about what they are doing, folks in the middle not so much. From what I see, it seems most mid-stage companies doing unglamorous enterprise software in Java or C# with regular dev teams of 5-20 people prefer NG. Obviously a biased sample, but perhaps interesting to some folks.