How can the weight of package dependencies be determined?

For instance, consider the “using/import load time” metric for the dependencies in some user package.

The @time_imports macro, as suggested in this other post, appears to be a valuable resource. However, it outputs a substantial number of items from unknown origins. This can be overwhelming for beginners.

I was just thinking: would it be too much to ask for just one metric, like the body mass index?