Since networks are a shared resource, forcing the user to tear them down if they decide some setting needs updating could be disruptive to running production workloads. Some settings on a network could be changed after the network is created without impacting the existing workloads running on that network.

Some ~simple examples:

• Labels
• Enabling manually-attachable

Others to consider:

• Name - might break assumptions elsewhere... but theoretically this should be possible
• Adding allocation ranges
• Changing MTU