It's super useful because on some very large collections with many files, the .torrent doesn't contain all the files (apparently a long standing bug?), and down

It's super useful because on some very large collections with many files, the .torrent doesn't contain all the files (apparently a long standing bug?), and downloading a file that's dozens of gigabytes big through a web browser requires a lot of prayer and faith that the download doesn't interrupt/can be resumed. So this tool is super handy for that. Heck, it's useful even for small collections just because of how convenient it is.