I only heard of DevOps maybe just over a year ago.
My career has always been about knowing how the whole system hung together as a whole. So I would know a little bit about everything. Hardware, software, networks, operating systems etc.
Getting to know each area was essentially also getting to know the people who operate those areas. You would get to know developers, and how they thought. Some thinking you agreed with. Some you'd already seen in other useless or lazy workers so it's no different for them.