Linear feeds are a dark pattern - A proposal for Mastodon https://tilde.town/~dzwdz/blog/feeds.html

I've polished the CSS style a bit, you can try it here: https://eapl.me/treed/

@eapl.me Read flags are so simple, yet powerful in my opinion. I really don't understand why this is not a thing in most twtxt clients. It's completely natural in e-mail programs and feed readers, but it hasn't made the jump over to this domain.

I think it is not easy to implement, you need a database. Timeline is an elegant solution: read and sort.