Applies to both Tumbleweed and 15.2.

I haven't looked far, but I haven't yet found another distro that has deprecated torrent downloads.
Torrents are today still the easiest and most reliable way to transfer a very large file... Unlike HTTP/HTTPS and FTP/FTPS/SFTP protocols, better torrent apps automatically checksum every individual chunk of data so that errors can be fixed almost in real time... With the other protocols unless you use a download manager that doesn't happen and you can checksum only after downloading the entire file.

Anyone know why openSUSE suddenly did this?

TSU