Author here. Even though we have different teams and products/services, there's still a baseline of "historical" code style and rule configuration at our company. Also, I personally explored the various codebases and reached out to several developers to get some feedback throughout the process.

The whole thing did not come out as a surprise for most of us. Even so, for those who were not aware of it, the benefits - as I captured screenshots of improvements highlighted from the warnings in their codebases after installing an alpha version of the package - were obvious.

Adoption was quite smooth and easy at first. Definitely not pushed onto teams for several weeks/months, until enough repos were onboarded and we had enough feedback that it would be beneficial for the whole company to use this.