I think that is a fair assessment.
Personally I have a budget ADATA SX900 128GB SSD in my primary workstation as the primary disk. To store all of my family's media, backup files, etc. I have 3x2TB HDDs:
- one for for media files, also exported as an NFS share across the subnet; music, movies, ebooks, etc)
- one for backups; daily rsync of /home, Bittorrent Sync shares/folders (laptop, my phone, wifes phone), misc non-media files too big for primary SSD
- one to backup aforementioned backup drive; cronjob set to run every day at 5am, spins drive up from sleep, mounts filesystem, rsync's data, unmounts filesystem, spins drive down to sleep
Obviously i dont backup the media files, i can always re-rip or download them if needed. I also keep my really important files backed up (encrypted) on a server I have in a datacenter somewhere.