For now, regular old spinning rust has a significant cost-per-gigabyte advantage over solid-state storage. Until fairly recently, it had a substantial advantage in density, too. High capacity SSDs like Samsung's PM1633a have gained some ground on magnetic storage, but Seagate's newest business-class SSD might fully cement the obsolescence of traditional hard drives with its 60TB capacity.
When users are introduced to SSDs for the first time, a common question is "why 2.5-inch? Couldn't you fit more memory inside a 3.5-inch enclosure?" As it happens, yes, yes one could. This new drive from Seagate uses the 3.5-inch form factor typical for desktop mechanical hard drives. Seagate says its monster is the largest SSD ever made, and that the new drive has "twice the density" of the aforementioned Samsung beast.
Details are lacking about the new drive—including any sort of performance information—because Seagate's only just now showing it off at the Flash Memory Summit. However, the company says the new drive will be available next year. Seagate also says the new drive will offer "the lowest cost per gigabyte for flash," although this unit is branded as "Enterprise" hardware, so it's really anyone's guess how much it'll cost. Backblaze estimates this drive will ring in around $20,000 a unit.