When you are capturing design history and the project keeps going complex with many steps, if you have to edit some "key" feature, you can have a hard time trying to find it, you need to find one extrusion among 500, so when you now there is a feature that probably needs to be modified later, or you are trying different things, or maybe even delete it, would be terrific help to be able to label it (and choose a color, and write text to see when you hover on it)
I think there is already room in the UI to add this 
