It isn't though.
Like I said, that would be like saying Netflix is THE streaming platform of the industry. It wouldn't be true no matter how you want to twist it. You can argue that Netflix is doing streaming better than any other platform. You could argue that Netflix has entered our daily parlance, with slang like 'Netflix and Chill'. But there is nothing that would make sense out of calling it THE streaming platform of the industry.
Same can be said here. Nielsen ratings are not universally exclusive to any point where you could call it THE metric of the industry.
Yes.Like the thing I linked some days ago said Nelson is used by what 25 of the biggest streaming related businesses and is being used by Netflix to push ad data and it has been a stable of actual tv numbers for years.
One of many. That your article didn't talk about all the other methods doesn't mean Nielsen is default THE metric.
Nielsen is accurate, but also heavily relies on extrapolated information, and does not categorize their information in a cohesive way. Their streaming numbers do not include any TV viewership numbers; they're calculated and categorized separately. And to my knowledge, they don't have any graphs for total viewership across all platforms. This is where methods like google trend analytics may be more accurate, since they would not be differentiating who is watching on what platform; rather it gauges interest in the show overall.
And overall, Nielsen may have less relevance in today's market, considering it's built around providing data for the traditional Ad-based revenue systems that TV shows relied on. As this changes for newer platforms, and companies like Amazon are using Prime Video to promote their online Shopping platform, there will be less need to rely on metrics that are built around maximizing ad-based revenue.
Amazon doesn't really care about Nielsen ratings and 'Minutes Viewed', because their platform isn't making money off how much time people are spending watching their shows, rather they care about the 'first click' potential, and total viewership numbers, regardless of minutes watched.