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by CyberFonic 3141 days ago
The question is about supercomputers specifically, which are mostly used by researchers and some applications like weather forecasting, aerodynamic simulations, etc. The infrastructures used by Google, Facebook, Amazon are massive clusters of computers, but they are not supercomputers.

In the research space peer-review and reproducible results are critical. So GPL does fit in well. The makers of supercomputers have to accommodate their clients' requirements.