[arthurcoudouy]

I can't agree more with you. I tried to sum my thoughts in my first reference

> One of the most common myths — and potentially most threatening to developer happiness — is the notion that productivity is all about developer activity, things like lines of code or number of commits. More activity can appear for various reasons: working longer hours may signal developers having to "brute-force" work to overcome bad systems or poor planning to meet a predefined release schedule.

The SPACE framework is not about measuring quantitative data only. I feel the need to explain how certain metrics might be interesting, but rather to identify key issues or unexpected events during engineering sprints. Without data analysis, you would not be able to understand why there is a drop of productivity during certain periods, and usually, those drops were created by the management (too many meetings or lack of follow-up)