You may want to make a feature...

[Nakilon]

... that would analyze all the gems specified in Gemfile and print these numbers as a table.
Probably the specified/resolved version of gem would matter too.

[zverok]

What the use case you have in mind? I mean, for a typical app just the same output repeated 20-30-50 times would not be that readable. Maybe we can bend the output somehow to catch the "weak spots" (too obscure/old gems used), but I am not sure how to handle it in a useful manner.

[jaredbeck]

This is not exactly what Nak is ask for, but my company wrote a gem that measures how out-of-date your Gemfile is. https://github.com/jaredbeck/libyear-bundler

[zverok]

@jaredbeck wow that nice! Planned to do something like this myself one boring evening :)