I use Facebook for brain-draining content; I can get hooked on Reels if I'm not too careful. However, I use Messenger the most to stay in contact with closer friends as it's above the Facebook post noise. I also get financial news from Reddit as users are kind enough to post Seeking Alpha and MarketWatch pay walled content.
I only heard of Bluesky once when Jack Dorsey left Twitter. Has it developed much in terms of both use and users? The last I saw, it was possibly an invite-only sign up system, or even closed to registrations, but it's been so long.
I didn't think anybody used Tumblr anymore. From my understanding, it was like Blogspot for people to create their own blogs, but the blogs had low quality posts in comparison, and a lot of it was porn. I thought that Substack had replaced it traffic-wise because of the authority of the authors on it along with the quality content they bring to the platform.