As someone working working on time sensitive code on embedded systems (DVRs that get UTC from the broadcast), I can certainly agree with the issues laid out in the post.

As an example: We have some certifications our product must pass and the certification body plays a 4 minute looping broadcast stream with the test condition in it. It turns out I handled the time jump hat occurred when the stream would loop around poorly and this caused about 1 week worth of headaches and delays in getting our certification. None of my code expects time to be ever increasing now.