To me, it's that little effort was put into it, so no commitment has been demonstrated. You wouldn't want to build anything serious on top of it because you'd probably just have to throw it away.

A project picked up casually, for a short time, is likely to be dropped casually, in a short time.

A userspace kernel is already pretty niche. Not many people will get anything serious out of it.

The slop problem is also a challenge to overcome. The project barely existed and has already pivoted in a completely new direction. Who knows when this direction bores the author and we get yet another pivot. Or the author loses interest and we end up with a dead pile of abandoned code like so many other LLM generated projects.

The previous state of the project could've made for an interesting VM runtime (safety of Rust without the issues that come with the lack of ported drivers). For this new direction, I don't think there's a similar sort of demand.

Stating that nobody will take it seriously is probably an exaggeration, but I consider these projects to be toys for the author to play with, I don't see why you would take more interest than going "huh, neat I guess".

Why should someone spend anytime on this kind of technical piece that is not created by human? Think about what you will get from this, the answer is pretty obvious.