May be off topic but I am simply lightly responding directly to one specific member which I will not quote to what I feel is for the most basically unusual information?
I will say looking on the WWW for a quick response is transparent to some that know by experienced and trained information.
No one would likely notice any ECU changes unless you connect via the OBDII diagnostic connector with a shop level scan tool with data logging capacities and run a data log and compare to a data log before the long-term power supply disconnect. ECUs are not AI (artificial intelligent) there are adaptive mappings in some ECU's, (not all) but they are very narrow maps in an ECU.
NO anomalies do not get stored up in an ECU in the idea mentioned in a response here on this thread. If there are unusual engine operation outside the factory engineered and designed mapping of the ECU then there are DTC like as an example often seen posted p0300 which is a generic DTC for anomalies of a undesignated engine ignition operation(s). The TCM and even ABS has as anomalous trouble codes as well these on various platforms. These anomalies diagnostic code numbers would alert trained auto technician to look at all possible causes. We tend to follow a tree of elimination to find the root cause of an anomalous DTC. These will also effect the monitors if the anomalies are not corrected which would have the monitors in a not state of readiness until the anomaly has been corrected and the cycles period run which can be several cold start to driving 50-75 miles a few times.
One of the latest responses the comments and conclusions about an ECU and how it works I found to be entertaining and sharing it with a few of us over coffee that offer and provide on a professional level EFI/ECU Performance calibrating ........we all smiled. I think some think that the current ECU in vehicle's are "supper computers"? It takes less then a minute to completely flash removing and replacing most ECU complete information using a pass-through tool.
Members on this forum will decide and do what they want on their personal vehicles' . Most will judge who really knows what they are talking about and also weigh their experience levels based on their information responses and perhaps even reading from historical responses.
I think I am pretty much over responding on this thread... In my opinion there is not much to add and it is starting to sway off topic and borderline against some of this forums responding guidelines (see #d. in rules) as I understand reading what they are.
At this point its like they say beating a dead horse.....or wanting the 1st prize of having the last
The term and original meaning "idiot light" was never designated for the yellow check engine (service soon operations) light. Think more RED indicators, red meaning DANGER!
Thanks for reading.....