That's fair and it's a good idea. I'll make sure we update the docs to be more clear. Ml.net does enable retraining TF models too so will make sure we publish examples too
You can train classic machine learning models like classification and regression as well as decision trees and more, or you can use pre-trained deep neural networks (Tensorflow, ONNX)
No, cntk is focused on deep learning and ml.net is more focused on traditional ML as well as making it easier to deploy trained deep learning Tensorflow or ONNX models in your apps and services