What would be the benefits of using both subsystems and logical partitions on the same computer?

What are the advantages of combining different procedures and programmes into a smaller number of subsystems inside a larger computer system? What are some of the advantages that the system could get from having logical partitions?

Is utilising both subsystems and logical partitions on a single computer advantageous?

When it is beneficial to do so, processes and programs that are executed on a big computer should be partitioned into subsystems. What are the benefits of breaking this system down into its individual logical components?