It's an Elixir framework for cross-platform mobile apps — has a LiveView-like API and a React Native-like native UI layer. I'm working on a couple of apps with it, and so far it's awesome!
Mobile's part of the plan - one Elixir codebase across web, mobile and desktop, with local-first as the groundwork. Covered in the post and roadmap (https://hologram.page/docs/roadmap).
However, usually the bad result is not affecting immediately and in the meantime the apprentice undergoes a lot of anti-learning before this becomes apparent. And the learning muscles have atrophied.
That is an important catalyst aggregating the problem. Juniors are reading less code, mostly generating and then AI code produced dissuades them from reading code even more and the skills take a bit even more.