What changed
HW Ascend/Atlas least exposed here as it uses a non-ABF based substrate (or at least we think so).
The longer term solution is to use glass core substrate like Nvidia Rubin. This bypasses the Japanese supply chain entirely since BOE, Lens & other Chinese players — via @tphuang
Why it matters
Ajinomoto's 30% supply cut, with 95% market share, threatens Chinese AI players, accelerating CBF/NBF/GBF validation.