"the core user experience of a product"

Na linha do postal "Characters em vez de personas" este artigo delicioso "Why Product Thinking is the next big thing in UX Design":

"features are merely a small, fragile part of the product. They are only a few of many thinkable solutions for a user’s problem the product tries to solve. Thinking in products means thinking in specific user’s problems, in jobs to be done, in goals, and in revenues.
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The core user experience is not a set of features; in fact, it is the job users hire the product for.
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A product has a core user experience, which is basically the reason the product exists. It fulfills a need or solves a problem people have. By that, it becomes meaningful and provides a certain value.
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Products become meaningful when the provided solution fits the uncovered problem. This solution describes the way how a problem will be solved. Thus, the problem-solution-fit defines the core user experience of a product. The concrete features are extending this experience and support the core experience, but they cannot replace it.
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When thinking in products, UX designers should be able to answer the following questions first: What problem do we solve? (User problem). For whom are we doing this? (Target audience). Why are we doing this? (Vision). How are we doing this (Strategy) and what do we want to achieve? (Goals). Only then it makes sense to think about what exactly we are doing (Features)."