Whenever you make a decision, something is left behind.
Not necessarily something bad. It might be a great idea, a wonderful opportunity, a majestic new era. The better the people around you, the better what is discarded will be. And yet, it needs to be this way, because there is no time, energy, resources, speed for all of it.
Making a decision is always a subtractive process, you have to remove what does not fit (at least this time) until you are left with a plan that makes sense and that can lead forward. It’s a loss, to many people, and it’s important to treat it as such. Mourn, communicate, reach out, grieve. And then, together, execute.
The way you go about this will determine how much people will contribute and how committed their contribution will be.