Nearly 20 years ago after reading Diffusion of Innovations I decided to use everything in the book. The company ran off a few svn servers (formally cvs) and so I ran a handful of Git courses at my work to help us ultimately migrate to Git (this was early days of Git). I explicitly tried to find folks not just near me, but physically around the office building across all of the floors, teams, and orgs. They were my early adopters and when random folks would come to me either curious or for help I would bring them to the "local" expert and together solve their problem, from there they had a local expert and little hubs sprung up. We had the standard svn => git mirror going when the time came to convert to Git full time in the office it was very painless and a complete success.

I was too young to understand that this is how you run a successful "transformation project", I simply was having fun using every trick from that book and done the same playbook a number of times over my career.