I was wondering for a time what
Duplicate a layer in QGIS actually does. Reading this question: Duplicating layers in QGIS 3.4
I was assuming that when duplicating a layer I could style each individually, however if:
"Changes to the base data (the shapefile) will be present in all instances of that data."
Yet I do not see this behaviour. I created a simple polygon, saved it, duplicated it. I then changed the original polygon layer. While the baselayer obviously chaged, the duplicated layer did not. Am I missing something?