Cool, you probably know my old colleague Hugo, he was one of the first SRE's at Google in a team of like 20 or so. (I wasn't there, could be mistaken).
Anyway, what "Production" was, is different than what devops is. DevOps is different things to different people. In the beginning it was "What happens when systems administrators do Agile".
(Genuinely), Confusion came about because of the "100 deploys a day" talk and the conference being called "dev ops days" (to include developers).
The two things got conflated and now everyone thinks devops are.. well, build engineers or sysadmins or developers who learned a bit of bash and terraform.