@Moon ActivityPub is a bloated piece of shit. twtxt is where it's at. It's RSS but for microposts.
@Moon Yarn.social (a web based front-end) uses separate feeds for each user after a certain threshold is reached. It's kind of like RSS. It's up to the webmaster or server to decide the limit of posts per feed.
Honestly, the only cumbersome thing about it is that you need to follow users or a registry in order to read replies from others.