Why would one opt to use an LLM-based AI tool as a compiler? It seems that would be extraordinarily complex over traditional compilers, but for what benefit?

It would be, in its ideal state a vague problem to concrete and robust implementation compiler.

A star trek replicator for software.

Obviously we are nowhere near that, and we may never arrive. But this is the big bet.

>A star trek replicator for software

That's a very interesting way to put it.