The Storage sense was introduced for the first time with Windows 10 1703 and now gets some new options. You can now enable storage sense to run automatically when running low on disk space (by default enabled). The section on which files to clean up now has a new (by default unselected) option to delete files in your Downloads folder not changed in 30 days:
The Free up space now section has a new option to clean up previous versions of Windows. It is an additional ways of deleting your Windows.old folder. It is still automatically deleted after 10 days, or you can delete it with the Disk Cleanup (cleanmgr) tool.