I guess it depends how aggressively they merge packages… Some software has different versions which are all useful. Some software has multiple packages which are different things, for example a theming engine can have packages for various widget libraries and various versions (GTK3, GTK4, QT5, QT6) as well as an icon theme.
On the other hand, repos like the AUR (probably nix too) have outright duplicated packages, made by independent contributors.
I guess it depends how aggressively they merge packages… Some software has different versions which are all useful. Some software has multiple packages which are different things, for example a theming engine can have packages for various widget libraries and various versions (GTK3, GTK4, QT5, QT6) as well as an icon theme.
On the other hand, repos like the AUR (probably nix too) have outright duplicated packages, made by independent contributors.