I don't know whether I'm correctly understanding what Google will do with shortcuts but I'd appreciate clarification from anyone who has deeper understanding of this upcoming change. My own understanding is based on the following Google documents:
https://workspaceupdates.googleblog.com/2021/12/timeline-update-for-migration-of-multi-location-drive-files.html
https://workspaceupdates.googleblog.com/2020/08/expanding-shortcuts-google-drive.html
https://support.google.com/a/answer/10686746
https://support.google.com/drive/answer/10864219
Google Drive allows files/folders to be in multiple locations at once. That’s not multiple copies of the file, that’s not shortcuts to a file with one real location, that is one file that is contained in two or more potentially-unrelated paths. Think of it as some kind of spatial anomaly.
A single file reachable by multiple non-shortcut paths is equally in all of those places. A shortcut to a file has one place for the “real” file and a bunch of references to that file. This change will pick a single spot for any files or folders you have that can be reached along multiple distinct file system paths, and put a shortcut to the new (single) path in all the places that used to refer to that file, but were not selected as its “real path”.
So, this has nothing to do with duplicates, and is unlikely to affect your use patterns.