I wouldn't be surprised if 5.2.8 is listed by now.
As far as whether or not it makes a difference, that is subjective and also determined by who is assuming liability...ie: an insurer that deems as loss is due, in part, to be a fault of the M1 that was determined to be caused by non-UL firmware or settings in the programming, well, that's when it makes a difference. Whether or not you or an insurer is concerned with the level of compliance (or lack of) and if it would be looked into varies. YMMV.
In my case, I've had systems and buildings compromised for whatever reason and the insurer, consultant, investigator, underwriter or what have you, desired documentation and proof and then forensically examined the installation, even in 1 case, so far as to load the panel into a bench panel to see if there was faults or errors in programming. While this is few and far between, the losses were well into 6 digits for personal property and almost 8 digits for the loss as a whole.