Let's say one of my b-roll folders on my hard drive is called "floods." Let's assume that I have 10 clips in that folder and that I've imported the folder as a bin into my current project. So now, I have a bin in my project called "floods" and in that bin are 10 clips, all flood related.
Pretend it's a week later and I have 10 more great clips of floods. I dump them in my "floods" folder on my hard drive and now I have to manually import those 10 new clips into my project. This is an enourmous time suck and totally pointless. If only Adobe Premiere had some sort of auto-linking feature that would be smart enough to scan my "floods" folder and update the clips within my project. It can't be that hard.