280 games over 10 years really isn't impressive (2.5x less than even D3D8 which was an unpopular 'inbetween' D3D version and only relevant for about 2 years). D3D12 (890 games) isn't great either when compared to D3D11 (4.6k) or D3D9 (3.3k), it really demonstrates what a massive failure the modern 3D APIs are for real-world usage :/

I don't think those lists are complete, but they seem to show the right relative amount of 3D API usage across PC games.