In "modern" UI, like if you look at Thunderbird or Firefox or Chrome, when you want to find something, you have search-on-type feature. A snappy UI allows for something like that to actually be implemented. Listing all packages is useful, especially if I want to remove things I don't use and I don't know in which category things exist. In my case, it would be going down the list of all installed packages and seeing if I can uninstall things I don't use anymore.