You have been around long enough to know that if the camera is working and meets your needs, don't fix what ain't broke LOL. My 54IRs are running the same firmware they had when I installed them.
There is a thread here somewhere that someone had I think 7 of that camera and decided to update them all to the same firmware and one of them bricked.
Except for new cameras like the PRO camera, firmware updates are usually security bugs but since we isolate the cameras from the internet, it is a moot point.
I jumped on the bandwagon when this new firmware came out because it was one of the few times an actual improvement was introduced - SMD 3.0 that was supposed to be a better AI algorithm- it was worse for me, and other members here, than the previous firmware I was on and it was missing triggers the previous AI did not.
When I tried to rollback my firmware I almost bricked the camera. It took a desperate attempt of holding in the reset button for 3 minutes, but the picture quality isn't as good as it was prior to the update.