Role-play: a customer panel where the eng lead has decided he wants you replaced. Win the room, or at least the next meeting.

The held-back follow-up is 'he says, in front of his VP, that he could have built this in a weekend, what do you say?', and the answer that loses the room is any version of proving him wrong; the answer that wins is conceding the part that's true and redirecting to the part that isn't (operations, evals, the long tail). Interviewers staffing this round have watched strong engineers get baited into a status fight they cannot win because the other person controls the home court. The quiet seniority signal is recognizing you're playing to the other people at the table, the sponsor and the VP, not to the antagonist.