I just learned:

https://github.com/ogham/exa the ls replacement has been replaced by https://github.com/eza-community/eza

the exa repo says:

exa is unmaintained, use the fork eza instead.
(This repository isn’t archived because the only person with the rights to do so is unreachable).

For the curious, looks like the story, contributor deliberations and conversations are here: [Question] Is this project still being actively maintained? · Issue #1139 · ogham/exa

hope everyone involved is OK & on to other projects

both projects are MIT licensed and written in rust.