Thank you for your response. Makes sense, and I'm happy to hear you and others are aware of the issue. PS. I now feel that I asked my question without first th

Thank you for your response. Makes sense, and I'm happy to hear you and others are aware of the issue. PS. I now feel that I asked my question without first thinking about it a bit more; sorry about that. I temporarily "forgot" that Zygote is a source-to-source AD package because, as someone who is developing and iterating over deep learning models for potential deployment to production, I naturally tend to think in terms of monolithic software stacks -- e.g.,"the TensorFlow stack," "the PyTorch stack," "the nascent Julia stack," and so on.