I moved to SSDs only in my daily use systems. My main has about 4TB spread over several smaller ones I collected over the years. My laptop and a test system each has two 1TB drives. My temporary quad core test system has a 1TB SATA.
If I were buying a SSD for general use I think 2TB is very affordable, with door open on 4TB if you need bigger storage. HDs might offer bigger storage still, but I'd only use it for bulk. I still run two NAS. One has 4x3TB HDs, the other has 4x8TB + 1x6TB HDs, with one disk each used as redundancy. I dump content I don't need to access daily on there. Old videos, photos, and a never shrinking pile of "unsorted" folders.