Cluster-sort will bubble up unique groups first. It is sorted such that KMeans groups with fewer entries will appear first and within each KMeans group the paths / lines will be sorted alphabetically. (you can use the `--groups` flag to take a peak at the groupings)
I maintain a few line delimited files of musicians to look up, movie recommendations from different country subreddits, as well as browser tabs that I failed to read during the week. I have a simple cronjob script to automatically open some of these tabs at various points throughout the day.
Cluster-sort is really good at sorting these types of files because even if the band name is in the middle of a sentence it will be grouped with similar ones (If the lines of text were exact duplicates I would just use `sort --unique` to dedupe them). Having the lines grouped together prevents me from googling the same things every month--but maybe the downside of this approach is no spaced repetition (SRS) and less of a chance to "acquire taste".