That might be true for some yes. But for others it might be "We are used to Ops patching machines, doing deployments after lengthy handovers etc and now Dev is

That might be true for some yes. But for others it might be "We are used to Ops patching machines, doing deployments after lengthy handovers etc and now Dev is saying that they can spin up everything they need in the Cloud and wants to deploy every week using a Gitlab. What now?". Of course Ops is still needed but what they do has probably changed a lot in this case. And their responsibilities and how they work with Dev must changed.