Most field types can be combined in a table view column. For example, level-1 can have a relationship field named “Column-A” and level-2 can have a text field named “Column-A”, and in the table they appear as the same column. Different field types, but same column.
I would like to be able to do this with the progress bar. But I currently have to choose between having an extra column in my table, or not using the progress bar.