I’m sorry, but those “suggestions” sound wrong - a chronological feed exposes users to untrustworthy content. The point is an algorithmic feed is unknown manipulation UNLESS the algorithm is known and published. Engaging less is also NOT a bad thing at all, unless you are the platform itself. The inference is that an algorithm will expose users to less political and untrustworthy content? Well, certainly not if the platform wants to generate continuous engagement through provocation and the creation of outrage.
But OK, it is an experiment by Meta, so let’s just leave it at that.
Not at all as I hear about all of them all the time (daily at least). It’s just that Bluesky and Nostr are both less than a year old so are seen as the new networks, whilst Mastodon and Lemmy (Fediverse) has been around a bit longer. Bluesky and Nostr’s protocols are very new, so many are asking what they are and how they compare. Neither integrate yet (unless you count Nostr’s bridge with Mastodon) with the Fediverse.