Adopting change management best practices reduces the risks in any business transition. The first time, the second time, the last time, and the next time. The risks may be technical or reputational, but always financial.
This applies not just in the IT area, but also elsewhere in the enterprise.
The main resistance to implementing change management are claims that it is bureaucratic: a needless overhead.
In change management there's a concept of "Maturity IndexOpens a new window": the five levels are shown in the diagram below. The journey you want your team to take, from where they are to (perhaps level 1 or 2), to where you want them to be (presumably level 5) is not going to be attained overnight.
With assistance from somebody who's travelled that road before themselves, and helped others to do so too, it should be quicker.
For more information on how we can help you with improving change processes, and reducing transition risks, please write to firstname.lastname@example.org