> Second, the price of spinning disks is such that it makes no
> sense to buy anything smaller than 4TB, which will fit all this,
> and 6-8 TB are often a reasonable idea even for single users.
You seem to assume a 3½" form factor which either requires a "large"
desktop or an external enclosure.
Personally I consider this form factor dead every since I bought my
first 2TB 2½" disk.
[ For reference, the last 3½" disk I bought was a 1TB WD Green, which
I fitted into my ASUS WL-700gE. ]
Stefan