The book Accelerate: Building and Scaling High-Performing Technology Organizations by Nicole Forsgren, Jez Humble, and Gene Kim details the findings of four years of research on how DevOps affects various outcomes, such as software delivery tempo and stability, as well as the organizations' profitability and market share. DevOps in this context means things like continuous delivery, automated tests, trunk-based development, and proactive monitoring of system health. It is quite clear that DevOps practices bring lots of benefits to organizations adopting them. The research findings are also in line with my own experience of DevOps.
The findings of the research are presented in the first part of the book (a bit more than half of it).