Musk: SpaceX targets first test chip by May-June, mass production by Q3 2028

Musk's own framing — "very aggressive" — is the real signal here: SpaceX is setting internal targets it acknowledges are stretch goals, and the explicit thanks to ASML for accelerated deliveries shows the timeline depends on supplier cooperation rather than SpaceX alone. The choice of an SRAM test chip as the first milestone is modest by design, a proof-of-process step before any question of scale. The gap between a working test chip and Terafab's mass-production ambition is where execution risk concentrates, and whether the May-June target holds is the first measurable checkpoint.