While I absolutely agree that niche spaces that fit your interests tend to have much higher content quality, this argument doesn't quite apply to social network

While I absolutely agree that niche spaces that fit your interests tend to have much higher content quality, this argument doesn't quite apply to social networks that attach to your IRL persona. No point in switching until most your IRL connections are there. In this case, if all your friends hang out at McDonalds, you're not gonna want to sit at your local bistro alone.