Probably not much of interest. Small team of... 4-6 had mix of experience with php, java and .net (min 8-10 years of each, fwir). Someone wanted to learn node (of course... always the best reason to choose a star), and pushed that on others. I gave up fighting that. Then we needed to "micro service" the node code because... well... you know... we have to be on AWS and lambda because... scale. Funnily enough, 'testing' and 'testability' never seemed to enter in to the decision making equation.