What if I told you that adoption/training was the greatest barrier to successful SharePoint implementation? And that 1) strategy and 2) governance were the next two big challenges?
Chart from OpenText about SharePoint challenges
The bottom line is this: like any other major organizational change effort, success lies in coordination with stakeholders, involvement of users, communication and collaboration.
The real challenge of implementing SharePoint 2013 is the same as that of any other intranet software. You need to convince thousands of colleagues in different job roles, with different levels of technical skills and different job pressures (and maybe different primary languages) to learn about and use the new/updated intranet.
– By Ephraim Julius Freed