I've come to realize how difficult I find it simply scrolling through clips in a bin using my MacBook Pro trackpad..
In thumbnail view, instead of scrolling smoothly down a bin of clips - as happens if I use the scroll bars - using the trackpad the movement is jerky. Visually, I find this disorienting and easily lose my place.
This isn't helped by the lack of a clear indicator showing which clip is highlighted, for example: