MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
I currently own 1537 of them, mostly used for permanent archival of photos, drone footage, MIDI files, etc.
When they go on sale, I buy them in lots of 10 or so. They are so inexpensive that I haven't burned a DVD in years, and although hard drives are certainly cheaper per Gbyte and more convenient, they are fragile and prone to fail even if they are stored un-powered for long periods.
8-Gbyte, and sometimes even 16-Gbyte SD's and Micro SD's can be found on sale at times cheaper than 1.44 Mbyte floppy disks were (for the good ones). These cheap SD cards aren't exactly reliable for daily use, but are stellar for archival and long-term storage.
I am in the process of printing some 12 x 12 racks that I can use to index 144 micro SD cards at a time, but I didn't publish these to Thingiverse because, as you observed, they seem to be a little more than the average user needs.
I keep the 48-card racks on my workbench filled with Raspberry Pi distros and backups, along with firmware for drones, Arduinos, SOC's, and FPGA's.