Based on a vague hint I got from OMTech a while ago, I think it might have something to do with using the machine in a rental / leasing environment, where it stops working after a programmed interval probably based on money changing hands.
This says something about that, in a vague way:
Protip: Never upgrade a machine’s firmware without absolutely solid knowledge that it will solve a problem you already have, lest you create a new problem you never imagined.
well… based on this info, I have no reason to touch the firmware at all. thanks for clearing it up for me and I’m sure a few others who were looking into this!!