well, at least whatsapp, wechat, youtube and even telegram are trying to get into the first category. i ignore the respective features. in my case i eventually realized that i would waste to much time if i would try to follow all the posts pushed there, and it would also take to much effort to curate that content, so i decided to completely ignore it instead. but i am old, and my life experience helps me to stick to this. for young people this must be harder.
i agree that this distinction is important, but i am afraid it is a lost battle, and as we criticize the negative effects of the first category of social media we need to also point out how social media can be useful when it is in the second category.