I used this to onboard to the PyTorch team a few years ago. It’s useful for understanding the key concepts of the framework. Torch.compile isn’t covered but the rest of it is still pretty relevant.
I’m guessing about 80%
To understand a complex system, sometimes it better to understand a (simpler) model system. Sometimes an older version of the same system is that good model system. This is not true always but a good rule of thumb.