What about those who are satisfied with their Medicare plans?
If you are happily enrolled in your Medicare plan, then the Medicare Open Enrollment period does not affect you. If you do not wish to make any changes to your plan, then you do not have to.
Medicare Open Enrollment for those that like what they have and do not want to changes is as simple as doing nothing. If you do nothing to make changes during the Open Enrollment period your coverage will move forward as is. In other words, your coverage under the traditional Medicare continues into the next year.