But of course, like any immutable system, there are mutable parts (otherwise, we couldn’t create any configuration files). OSTree handles this with “overlays” (actually, we use OverlayFS) that allow a read-write filesystem to be layered on top of the immutable system. For example, the /etc and /var directories are writable, while the rest of the system is read-only.
The Mini 12 also offers a number of other niceties. I appreciated the larger-than-average viewfinder and the small counter that shows your remaining shots, which is a useful tracking feature given that each print costs about $1. However, it doesn’t support Bluetooth or pair with a companion app that allows you to edit photos (only scan them), and it doesn’t feature filters, lens options, or portrait modes. But if you’re looking for a solid instant camera that caters to all ages and experience levels, you’ll likely be satisfied with the Instax Mini 12.
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