> Updating HDD firmware is something you do to resolve a very specific problem, not ... just because it's available.
It is important to check if there is an update and what has been fixed. Like with any software, it may introduce new bugs, but blindly suggesting to "not touch, if it's not broken" is harmful too. Some time ago Samsung rolled out SSDs that were self-destructing after very short period of time and fixed this in firmware. If your SSD breaks or start having problems it is already too late to update, you have to be proactive. And hardware vendors doesn't release firmware updates for nothing, in most cases there is very good reason for that.