Goldshell HS5, CKB6, LT5 Pro firmware update questions

Has anyone updated the firmware on their Goldshell HS5, CK6 or LT5 Pros? I have had mine for over a year now and haven’t updated any firmware on any of them. What exactly do these updates do? Should I expect a performance increase? Just wondering why I would update if all my miners are working fine I don’t really see a need to change anything.