For most of the lay users I help in the community 4tb is immense. For most of my colleagues (I work on Kubernetes cluster backbends for large companies running streaming services you likely use, among other 'big' data companies) 20-50tb is if you run your own all time backups (usually with ZFS and the like so divide that by 3 for total usable space). The guys that are running IPtv or other sketchy video streaming and scraping software are hovering around 100TB-200TB in their NAS and none of them actually run user grade hardware... I'm honestly very surprised to hear it referred to as 'smallish'.. At most I'd say 100TB is about middle of the road now days for media horders and small for media content producers.

Now my buddy that worked on the CEPH storage backed at CERN would laugh at any of these numbers... but that's a different ballpark all together..