Today, efficient database interactive administration cannot easily be achieved without Enterprise Manager, this does not mean the command line interface is obsolete, it simply means that using commands to perform the daily database management tasks will take longer than using the graphical interface.
Considering this, keeping Enterprise Manager DB Control Console available will provide the DBA with a more efficient way to easily manage the complexities of Oracle databases. The tool to assist the DBA in making sure EM will be properly configured is the EMCA, and as we have seen, the EMCA is much more than just a tool to initially configure the console. It is a tool that allows the DBA to customize the nuts and bolts of the console.
On the other hand, keeping the software up to date is a good practice, it wipes off known bugs and it lets you prevent possible security breaches with a more robust and secure software version. OPatch is the tool that allows you to manage your software updates...