Yeah, well firefly at least handles a normal (as opposed to a full) scan rather clever.
If the timestamp of a file/folder etc hasn’t changed, its skipped during rescan.
That way even on a slug with a huge database, the scan is actually not that bad.
But I third that statement, and I know there are a couple of script-based implementations around here. For the time being, I’m ok with scanning though. 🙂