Something like a Mastodon+ where besides hosting just our microblog posts, each account would also have a modest amount of storage (maybe just 1 GB or even less) for a personal mini-website as part of our profile, where we could have other content in a more stable place for people to access-- for example essays, tutorials, reference info, fiction/poetry, pdfs for download, whatever someone might want to make available that isn't just a temporary toot that quickly scrolls away into the sunset.
The account profile would have a link that opens to a personal "home page" which is just a list of links to the various files (with room for description text for each link).
For the user there could be a settings page with a template to enter "Description: link" lines for each piece of content, and buttons to upload/manage the content files. Preferably the content pages would be in markdown format and would be rendered for the browser like the way github does with readme files. That way users wouldn't have to know how to do HTML.
This idea is because getting a domain, learning html, and creating a website is just not something most people can or want to deal with, but would still like to be able to have a place to put some of their stuff online. Another possible option might be ability to specify whether the personal mini-website is available to public, instance members, followers only, or mutuals only.