There's a story about the Microsoft Word team. I'm not sure it's true, but here goes:

The team had heard that most customers only use 5% of Word's copious feature set, and as part of some rewrite the team set about finding out what the 5% were.

And it was most of the feature set. Customer A used these 5%, B these others...

It's easy to say just one option without describing exactly what that should do. L10n raises some questions, for example. Or just two options, or three. Much harder if you want to be specific.