The DevOps movement is undeniably pulling Developers closer to Operations. "Shift left" and "You build it, you run it" have become common slogans. However, for years, we were told that developer involvement in production was verboten — a bad idea that would surely lead to chaos, poor productivity, and higher costs. Our legacy processes, policies, and technologies were all built to live within and reinforce the Dev and Ops divide. This talk will examine: 1) what changed 2) how to make it work at scale.