More the latter, I organise mostly by type (movies, series, music, podcasts, comics, books, photos, images etc) and use (workfiles, documents, resources, tutorials etc). There’s was a whole subreddit about this, datacurator, not sure if something similar exists on Lemmy.
https://github.com/roboyoshi/datacurator-filetree
Basically doing a variant / slim version for my needs
I would advise against using dates in file/folder names for almost anything except for maybe photos and documents. Always pair with searchable keywords. Will you remember when exactly you downloaded that random picture when you wanna find it a few years later? Have fun looking through a hundred /year/month/day folders.