Some years ago I burned a quadrophonic bootleg version of Dark Side of the Moon, the original Alan Parsons mix (which sounds much better then the official version) so a friend can listen to it on his 5.1 home cinema.
Besides that I haven't used DVDs in more than a decade, harddrives are cheaper, reliable, always online, run btrfs with realtime checksums and are easy to backup. Besides last time I checked most DVDs don't read anymore.


