From a support ticket a needed functionality, which I think is not that exotic many others could benefit:
Executing a groovy script on scheduled regular bases.

The way to implement it with the tools given would be:

• Have a scheduled Job executing a command
• The command to execute is capable of running any groovy script in the goovy script workspace

What is missing:
A command, that can be configured able to execute any groovy script registered in the groovy script worksapce.