DevSecOps has finally become popular within the wider IT industry in 2019. I started as a web developer in 2001, learned about testing automation, system deployment automation, and "infrastructure as code" in 2012, when DevOps has becoming a popular term. DevOps became common after the release of The Phoenix Project in Jan 2013. It has taken 7 years for security to become integrated within the devops methodology. The following is a list of concepts I go through with project owners, project managers, operations, developers, and security teams, to help establish how mature their devops and security automation is, and to help them increase that maturity over time.
PII and public facing = high
PII and internal facing = medium
no PII and public facing = medium
no PII and internal facing = low