Live, hands-on sessions with an expert will give your team understanding of the nuances of a new technology, and enable them to write idiomatic and efficient code. Making your frontend developers comfortable writing backend code like a backend developer (and vice versa) will reduce friction, and result in more ownership of features, quicker progress, and a team that is much more versatile. Without this, you’ll risk ending up with e.g. Go written like JavaScript and TypeScript written like Haskell.
# hand-offs
Deploy frequency
Cycle time
Developer eNPS
Spend on hiring
Developer retention