The reason libusb so strongly recommends using the udev mechanism is to avoid race conditions. For example, udev might be in the process of changing Unix permissions, uploading firmware, or mode-switching USB devices.
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We now have a minimal command-line, implemented ourselves using sys.stdin.read and sys.stdout.write, using ANSI escape codes to control the terminal. It is missing out a lot of functionality and hotkeys that "standard" command-lines provide, things like:
I appreciate the Voyager for its elegance, but I don’t travel with it, so the super thin keycaps were not a selling point for me. I got resin-printed key covers to replace the top row of unused switch slots and a set of KLP Lamé keycaps from 3dkeycap to give a sculpted profile to the remaining keys. They are blanks in a solid grey color that lets the keyboard LEDs shine through. I don’t like animated keyboard LEDs, but I have customized solid LED colors to make each layer visually distinct and to help me out with some infrequently used keys. My Voyager has clicky Kailh Choc White keyswitches.