Yeah, FB was killed by the younger people abandoning it for other SM. Twitter was killed by Musk. Reddit was killed by Spez.
And by "killed", I mean "lost some users and content quality". They still have millions of active users.
And my personal feed on Reddit is pretty much unchanged. Very few niche subreddits went into an extended blackout, so I still got all my content. And since I use the mobile website (FF+uBlock), the API change didn't affect me that much. But I hope more communities from Reddit will move over here, especially the non-tech ones.
I think FB and Instagram should be considered seperated although both owned by Meta. Anecdotally the people around me aged 20-30 only ever use FB for local groups and marketplace but not in it's original capacity.
I can recommend Kagi. Yes, it'll cost you to use it (but not a lot, eg. I'm on the $10/month plan), but people expecting to get everything for free online is what got us into this mess in the first place.
Google isn't concerned with their search engine right now. ABC is a mega tech conglomerate, the search engine is like a miniscule about to their revenue.
90% chance that if you use DuckDuckGo or Bing, it's on a chromium browser, which means you very link have a Google account