Backup of what?
My entire file library is around 5tb, so that just goes on drives, my critical documents and stuff go on several different hard drives and flash media... I just don't see any point in optical media.
Probably won't even bother installing an optical drive in personal desktops for myself from now on.
Do you fit your 5TB on flash media?
Presumably you do as I do - do selective backups of critical documents. And things like my personal photos, source code I work on, email easily fit into 4GB.
mp3s also fit onto only a few DVDs - yes I have a backup on disks too, but it's a cheap way of making additional backups.
It's also easier just to drop an additional backup DVD in my bag than lugging around a hard drive.
Do you mean that you'll rely on an external DVD for when you need one (I can see that argument), or you don't need one at all.
I need one for ripping/playing CDs/DVDs I buy; it's useful for boot media; and well, playing games like Civilization

I wish they would drop the stupid CD checks (and no, Steam doesn't count either).
Aimee -- a 4gb mp3 player would be cheaper, smaller, faster and easier than buying 50 CD-Rs, and you could write over them later too.
I didn't get an mp3 player until relatively late (end of 2009). I don't know about Aimee's, but most "CD players" will do mp3 playing. The problem I had was that although a 4GB player would be smaller, it wasn't anywhere near enough to hold my collection. Since I mostly used it when travelling rather than walking, the portability wasn't an issue (plus I had my phone if I wanted to listen to a few mp3s when walking).
You can "write over them later", but changing the mp3s like that is a huge pain, and simply picking up a few of mp3 CDs each time I went out was far easier and more flexible.
I found it frustrating that for years, there was a huge gap between mp3 players with too small storage, expensive mp3 players with far more storage than I needed, and mp3 players that might have been okay, but were expensive and oversized because they fitted in things like Internet and video and software that I wasn't interested in. And it didn't help that few supported memory cards. But now I have the Sandisk Sansa Clip - £40 for an 8GB player, plus £15 for an additional 16GB memory card, finally makes a worthwhile mp3 player
