43 days, 17,040 AI signals: four things the data says that trend lists won't tell you

I collected 17,040 AI signals from public sources over 43 days. Four findings: only 23 of 1,493 tracked models have enough history for a trend; leaders barely move while churn at the edges carries the signal; one aggregator is 38% of the volume; and why I publish 'not ranked' instead of guessing.