For years and years the main storage device in a computer hasn't changed much. Removable storage, in the last 30 years, has gone from floppy disks holding 1.44 MB to Blue Ray discs holding 128 GB (BDXL), with many options available both in the past and the present, like CDs, DVDs, USB drives, etc. For a computer main storage device, though, we have been stuck with Hard Disk Drives (HDD) since they came up.
