Does anyone have a good example of using the FileManager system in a way that handles local vs. S3 based on a mode definition?

did you look at the airline-demo? https://github.com/dagster-io/dagster/blob/master/examples/airline_demo/airline_demo/pipelines.py#L54-L81 https://github.com/dagster-io/dagster/blob/master/examples/airline_demo/airline_demo/unzip_file_handle.py

Not closely enough apparently. Thanks 🙂