@jenniferplusplus Of course, I too believe that "being testable and observable does not detract from velocity".
Though since the DORA people and the book "Accelerate" by Forsgren, Humble and Kim, 2018, did the data and the science on how quality and velocity *correlate* rather than being a trade-off, this is link not just a "belief" , it is an evidence-based view. i.e. a "to the best of our knowledge" scientific fact