To clarify, my autorcm switch was purchased on release day last year. I only installed AutoRCM last week. And noticed a difference in battery. This is subjective, as I did not test this before installing autorcm. I installed firmware 5.1 from 3.0 through choidujours by rajkosto, therefore I am averse to undoing autorcm, as that would burn my e-fuses.
Before installing autoRCM, the release day switch got very little use outside of a run of botw. it was either asleep in the dock, or was shutdown collecting dust on the shelf. The battery may have degraded naturally due to the passage of time, and yet it was immiediete when I noticed the battery difference after hacking my switch. This could be due to using the tinfoil app to install nsps, or playing games mostly through the sd card.
Since the Switch knows something is corrupt. Does it have some function that is running because of the corruption? Like a check or a process that emulates that broken part?
This was a theory I had regarding why some people report different battery life after autoRCM. The switch doesn't have a process manager, you can't really monitor fanspeed, temps, or monitor what is using cpu/ram usage. So it's a very difficult to gauge the internal processes of the switch for those of us who aren't versed with the intricacies of horizon. It's not like we can play with clockspeeds like in the psp era.
I have a feeling that future CFWs for the switch may add improved optimizations, and decrease unnecessary usage of battery for otherwise erroneous tasks. Though it seems Nintendo has already optimized horizon quite well, I do wonder how all these implemented security measures in the system drain the system's resources.