> node.js application with 100000 dependencies where an update from package version 34.2.4 to 34.2.5 breaks everything because the developers decided to change

> node.js application with 100000 dependencies where an update from package version 34.2.4 to 34.2.5 breaks everything because the developers decided to change the order of parameters in one function just for fun. aka "totally unknown environment" which you "need feedback about what works and what doesn’t"