I don’t plan to neglect backups. Currently I use Syncthing as well, but only between non-redundant storage locations, so I have duplicates. Like phone pushes photos to pc or laptop, those sync them between each other. Important docs that I can’t lose are also on all 3 devices.
And I plan to keep the local storage of mission critical data around on some clients at least. I just want to have a central, more robust, redundant system where one or 2 disks can fail without my data being gone or corrupted.