From someone who has managed both Developmentals team and Operations team for decades.. trust me, they are different beasts and have to be handled/tackled differently.

Expecting Devs or Ops to do both types of work, is usually asking for trouble, unless the organization is geared up from the ground up for such seamless work. It is more of a corporate problem, rather than a team working style or work expectations & behavior problem.

The same goes for Agile vs Waterfall. Agile works well if the organization is inherently (or overhauled to be) agile, otherwise it doesn't.