You’re right. This is not heavily related to event-store.
I’ve always worked in situations where everyone has to where “hats” from multiple BCs.
That said, having an integrated team where an “ops” specialist is embedded with the developers has proven very successful. Lots of accidental innovation. I noticed that entire classes of production problems simply never happened because everyone was working on “making the software run in production”. Not “writing code” and “monitoring software”.
People call this devops now. And then they use devops to mean “we would like to hire people, but don’t want to actually change anything about how we run our organization, so we’ll use this label…and we’re agile too”.