Thank you for the feedback and thoughts Pawel.

You are right that the product strategy should be aligned with the business strategy, as well as the product porfolkio strategy if the product is part of a (related) group of products--think, for example, of Microsoft Office. I've omitted both strategies to keep the model focused and easy to understand. But I discuss the connection to the other strategies in my book Strategize and this article: https://medium.com/@romanpichler/a-strategy-map-bb0019f27f4e

You are also right that a product strategy has to fit the capabilities of an organisation--it must be feasible. I recommend testing feasibility / fit as part of the product strategy validation work, which I discuss, again, in Strategize.

HTH!