Few years ago at work, people were using them to clean electronics after soldering, etc. but once, they did it on a board with a MEMS device, a gyroscope and accelerometer chip. Took them a while to figure out while none of them worked until they narrowed it down to the ultrasonic cleaner…

While I’m a fan of GrapheneOS, I think it could still be considered “tied to Google” both due to it being based on Android, and also because it only runs on Google Pixel phones. Graphene focuses more on security, then on privacy, but not so much on reducing our dependency on Google’s software and/or hardware.