The more experienced you get, the harder it is for any one interviewer to really grok your breadth and depth. This is doubly true in youth-biased tech cultures like Silicon Valley, and quadruply true 12 years into a bull market for tech.
At some point the game becomes: read your interviewer and tell them what they want to hear.
At some point the game becomes: read your interviewer and tell them what they want to hear.