For general background if you haven't heard the term. https://en.wikipedia.org/wiki/No_Silver_Bullet

More specifically they'd buy into the idea that everything would be better if they just did/bought/adopted X. And they did this a lot with everything; technology, processes, organization principles, etc. During my short time there they adopted scrum, then extreme programming, then back to scrum, they switched their development from monoliths to extreme micro-services (one verb/service), they reorganized the teams 3 different times based on different principes... this continued ad nauseam.