This is, simultaneously, the reason why social networks want to use non-chronological timelines, and exactly the reason to use chronological timelines: so that it discourages perpetual usage.

On Fediverse, I can open the page, read the things that are new since the last time, and close it.

If you follow a decent number of active accounts, a chronological feed is different, too, especially if it is like Twitter/Bluesky (and unlike Facebook) where responses are the same kind of item as top-level posts.