So... I agree that growing constantly is important. But I don't agree that having constant side projects and learning the new cool language/framework du jour i

So... I agree that growing constantly is important. But I don't agree that having constant side projects and learning the new cool language/framework du jour is necessarily valuable. I think that there's just too many technologies out there, moving too fast, to be proficient in a significant fraction of them, even if you invest all your time in learning them. I think there's more value in learning how to do engineering well in one language than learning how to do basic stuff in 20 of them. Because the skills and knowledge of going deeper transfer much better than knowing syntax, etc - stuff you can always pick up for the next job once you know what it is.