How long does it take to create a product vision?

• For any Product, the hierarcy, in terms of immediate to long-term is Execute -> Features -> Roadmap -> Strategy -> Vision
• The focus for any product team should be to execute & launch and then working on the features & building on the roadmap from a bottoms-up perspective. They should also embark on a top-down appraoch of understanding the market landscape, the user problems they can solve profitably and setting the vision. The intersection of these approaches can take anywhere from a few weeks to a few months to a few years and depends on the stage of the firm, the product, the type of company and the lifestage 
• For start-ups, Vision trumpes everything else and would be required before they raise capital, attract talent or are able to build. Tesla is an excellent example here. 
• For large firms, product in market thats generating revenue trumps everything else and they have the chance to stumble upon a good strategy or vision if they keep iterating. But, this isn't a given, most firms stumble & fall rather than pick themselves up & iterate. Chevy has the vision laid out for them by Tesla but they haven't been able to take the Bolt to where Tesla is. 
• For other firms, the answer lies in the middle of the specturm. PoleStar & Riviian are able to ride on Tesla's coat-tails, Toyota continue to follow their incremental approach with the Prius but it feels like an opporunity lost, BMW & Merc have launched incredible electic cars that feel like the future, etc

It can take anywhere from a few goals to multiple weeks. In addition to the thought that goes into it, its important to align stakeholders to your vision and this can add time to this task.