You still have to compile your own Docker image and then "run it" from a Jupyter notebook if you are not using their Estimators (who uses those?). What is the point of just launching Docker images from Jupyter notebooks and looking a different window to see the log?

Serving is ok on Sagemaker, i will admit. The new ones: feature store, pipelines, and data wrangler - we will see, all rushed (some more than others).