(#iaiqdeq) It could be interesting.
As has been discussed, these services are ‘centralized’, although having mirrors hosted by volunteers syncing somehow, would be a good idea. So if one server disappears you can jump to another.

I lost track of Registries, but they seem to be down, which is an example of that problem:
https://twtxt.readthedocs.io/en/latest/user/registry.html

And I’m aware of this kind of CSVs made by ‘scraping a social graph’, but they seem to be manually updated:
https://github.com/tkanos/we-are-twtxt