Depends on how much abstraction you have, I have seen big companies where deploying code is basically like using Heroku. As an engineer responsible for a couple

Depends on how much abstraction you have, I have seen big companies where deploying code is basically like using Heroku. As an engineer responsible for a couple of services you don't need to know or care if this code is running on bare metal, Mesos, K8s and you care even less about the data center. I come from this old world of managing switches and servers and today we definitely need a lot less people to run code in production. I used to work at a company with ~2000 machines in physical data centers before containerization, this required a huge infra team - I'm sure that today I could support the same workloads with half the team.