@Nicolas, We've discussed in the past how the low voltage warning works. I have a case where it could easily be misunderstood. I have an external USB 3.0 hard drive, if inserted to a running MB it triggers the low voltage warning and the warning remains. Whereas I am sure that the low voltage was only transient because if I switch on the Pi with the drive attached then there is never a warning.
I know, the low voltage warning latches. How about printing a time stamp together with the warning, so that people can see that the low voltage is recurrent or not?