Comment by NitpickLawyer

> It's timed this way because the term is not yet well known

The basic concept has been here since llama3, in the open models. Likely earlier in closed labs. You use the previous gen models to curate and prepare data for the next gen. Now with the added benefit of actual arch/algo improvements (also public since gemini 2.5 gaining 1% efficiency on training next gen). This has been known for at least 2 years, in the open.