A nice piece that outlines all the challenges, the opportunities, and the cultural and social adjustments that need to be made within organizations to maximize the chance of left-shifted testing being successful.

IMPO, as a developer, I see QA's role as being "auditors" with a mandate to set the guidelines, understand the process, and assess the outcomes. I'm wary of the foxes being completely responsible for guarding the hen-house unless the processes are structured and audited in a fundamentally different way. That takes fundamental organizational change.