Often times data sources update on an annual or semi-regular basis and we start using the new datasets in that year's projects. In regional planning, much of our work is cyclical or annual, so many of our workflows involve copying last year's and updating with new data. We also sometimes get the design of some layers looking nice and need to make a new map with the same symbology and labeling, so we'll copy the map, but we still have to add the new data and import the symbology for each layer manually, or manually set the data source for each individual layer. If there were a way, maybe from the data source tab of the TOC, to change the source en masse for all layers living in that location, it would be a huge timesaver.
The 'power' part of this comes from the fact that sometimes it's not just the .gdb or folder that's named with a new year, but the feature class or .shp itself. In this case, it would be nice to be able to select the portion of the name containing the date/year with a wildcard (similar to the options available in ModelBuidler's batching tools or PowerToys PowerRename).
