And when you have that gear, what is it used for? Obviously businesses can, but a home user? Even with an appetite for movies etc you would have filled your drives in no time.
Now i started doing photography as a hobby, and boy, are those raw files large. 24mb each. Last weekend i was on a short trip with friends, 75 GB of raw photos and videos. Gotta back those up, the faster the better.
You can also use versionning when you sync your files.
I do file backup of my photos, documents, invoices, and other random things I've setup for backup.
Edit: add more info
What do you mean?