Each of us has, at some point in time, worked somewhere that has gone through a change of leadership. Normally, the higher up the food chain the change is, the more potentially disruptive that change will be. For example, a new CEO will, over a period of a few months, change the leadership reporting to them via hiring and firing or via organizational realignment (firing by moving chairs around). They will also have some new vision and business drivers to increase some business metric, which is why they got the job.
Most of the time, those lower down the food chain don't see an impact, at least not for a while, however, impact will come. You can guarantee it.
When you're looking at something that can be quite radical, such as the adoption of CD and DevOps, there is a massive risk that a decision in a board room could completely ruin things, especially...