This is great advice from Lindsay Grizzard—getting agreement is so much more important than personal preference when it comes to collaborating on a design system.
When starting a project, get developers onboard with your CSS, JS and even HTML conventions from the start. Meet early and often to discuss every library, framework, mental model, and gem you are interested in using and take feedback seriously. Simply put, if they absolutely hate BEM and refuse to write it, don’t use BEM.
It’s all about the people, people!