I think this is the direction ActivityPub is headed. You can already add .rss to the end of someone's Mastodon account to get their posts as a feed (e.g. https

I think this is the direction ActivityPub is headed. You can already add .rss to the end of someone's Mastodon account to get their posts as a feed (e.g. https://mamot.fr/@pluralistic.rss https://mamot.fr/@pluralistic.rss) and ghost.org is working on their AP integration for longer form content (more info about the beta here https://activitypub.ghost.org/ https://activitypub.ghost.org/) I think PeerTube has RSS support too, but I've not experimented with it.