What's the difference between V1 and V2 updates in priority and rollback behavior?

What does rdisp/vbdelete control, what's the default, and how do you disable it?

Which four database tables hold the data behind the update mechanism?

Which report reorganizes update requests by deleting incomplete ones?

How do you split V1 and V2 processing into separate work processes, and what's the system minimum?

What defines a logical unit of work (LUW), and how does it end?

Why are multi-step updates saved up and executed asynchronously instead of being written immediately?