As with all new things, it will take some time before UX Strategy establishes its position.
“UX strategy is about building a rationale that guides UX design efforts for the foreseeable future. UX strategy can be effective in an agile environment if you can complete the strategy before agile development begins. Following a lean UX process, you can develop a UX strategy that is sufficient when time and money are very tight, and you need to complete a working product at the earliest possible date. However, lean UX does not serve UX strategy well in large companies that can afford the time and resources to collect and analyze the data they need to formulate a strategic UX roadmap that produces a sustainable competitive advantage.”