This enclosure could be useful for two applications where size is important.
One would be to create an SSD + hard disk hybrid disk array for a computer’s main secondary storage. This could allow for an SSD that is small enough for the operating environment (operating system, main applications, etc) and any so-called “work files” (virtual memory, print queue, hibernate image, system registry, etc)while a 2.5” hard disk can work as a data store.
Another application for this cage would be to set up a 2.5” dual-hard-disk RAID array that can fit inside a 3.5” drive bay. This unit would also please anyone who is building a custom Windows Home Server or Linux network storage system.
The main issue with these enclosures, like MiniITX motherboards, is that they need to be available to the computer hobbyist market. This means having them for general sale through electronics and computer retailers and for sale at computer fairs. This is more so in Melbourne, Australia where the Sunday computer fair is becoming part of the hobbyist computer scene.