One common manifestation: New strategy! Let's reframe the UX around it. "How will that work with {old users}??" (distraction/dilution ensues) Often should be: {old users} are 1% of market, growing linearly. Either that #'s irrelevant or our new strategy's failed—ignore for now.https://twitter.com/backus/status/1087185426987642880 …
Lots of strategies here, as you suggest—but I think the important thing is mindset. That *question* can't be looming while trying to execute a new strategy, or it'll dilute the thinking. Put it aside; deal with it after the core thinking's done.