It could also be that the world as a whole cares less about privacy today than they did seven years ago. Without a relative measurement from a similar platform, it's a bit of an empty statement

One thing that has certainly changed is that algorithms have become more aggressive. If your content isn't performing well, it gets hidden much faster and more aggressively than before. This makes sense when you consider it from the PoV of the platforms (they have much more content to choose from)