Twitter at least still provides the “Following” feed which is still just that chronological feed from people you follow.

But contamination leaks in via diffusion from the “For you” feed via retweets and reactions from the people you follow. Still with judicious curation it’s still possible (for me, mostly a lurker) to have a mostly-positive and non-toxic experience on the site by unfollowing accounts that begin to orbit too close to the culture war battlegrounds, and by blocking any commenters trying to inject toxicity into the threads I read. It’s certainly getting worse as we head into USA election season and overall moderation and anti-botting deteriorates though.