Ubiquity used MongoDB for their CloudKey Gen1 series. When there was an unexpected shutdown, there’s a random chance it would lose its configuration [1]. If your SD backup didn’t work, you’d lose configuration for all WiFi hotspots. If you did client installs like I did, this was a total nightmare. How did they solve it? Release new, more expensive hardware with a battery backup acting like a UPS. Never solved Gen1 issues. Imagine your phone corrupting after a hard reset. Thanks Ubiquity & MongoDB

[1] https://community.ui.com/questions/MongoDB-corrupt-after-eve...