Wasn't SN11 already completed when SN10 failed? SpaceX has a production pipeline, they're working on multiple rockets in the same time. The lessons from SN9 an

Wasn't SN11 already completed when SN10 failed? SpaceX has a production pipeline, they're working on multiple rockets in the same time. The lessons from SN9 and SN10 are probably incorporated SN20 or even later version. (Or corresponding versions of Raptor engines.)