What's the difference between operations and cloud computing?

What are the differences between operation and maintenance in the era of cloud computing and traditional operation and maintenance? Traditionally, operation and maintenance personnel are exposed to hardware, such as servers, equipment and wind, water and electricity, but in the cloud era, operation and maintenance personnel can no longer see any physical equipment. Therefore, from this perspective, the means and purpose of operation and maintenance in the era of cloud computing are different from traditional operation and maintenance, because operation and maintenance personnel do not need to maintain the stability and reliability of physical hardware. Of course, when God opens a door, he will certainly meet a window. Since the operation and maintenance personnel no longer need to be bound by the stability and reliability of physical hardware, new problems come. The era of cloud computing has also brought new challenges to users.