I think it can become diluted to a meaningless term, or co-opted to mean different things to different audiences (not to sidetrack from the point but the first two examples I can think of what I mean are "fake news" or "woke")

So you're not wrong at all, but I think there's also a significant difference when the personalized algorithms come into play, which can segregate people into their own epistemological echo chambers

I suppose I'd summarize as

1. I don't think we have a precise term for the actual thing, and "social media" is one loose term people use for it

2. There's a spectrum for this, maybe multidimensional:

* Does it display the same reality for everyone? For example obviously true social media will be different depending on your friends, but chronological vs engagement are different. Even new reddit and old reddit I think differ here too

* Infinite scrolling? Or specific page advancement?

* Text? Pictures? Video? (Video duration?) Each one is different

So in that respect, sure, they're all social media, but they're very different, and I think there's probably combinations of those features that result in very different effects/harms