Comment by tptacek

Yes: because it took forever for curves to percolate into the WebPKI (as vs. the TLS handshake itself), and by the time they did (1) we had (esp. for TLS) resolved the "safe curves"-style concerns with the P-curves and (2) we were already looking over the horizon to PQ, and so there has been little impetus to forklift in a competing curve design.