Imagine a plugin that defines a task that runs eg hourly or daily. This plugin also has a status page showing for example which files will be imported on the next task run. It would be nice to show an information like "these files will be imported in X seconds" or "X minutes 50 seconds".
It is possible to do this by reading the correct value from the option table and unserializing the stored value etc. but it's kinda fragile and not as nice as an API.
Moving to mid term as it is a nice to have.