When do you cancel IFR?

When do you cancel IFR? How do you make that determination? Lets examine a little about what your IFR clearance actually does for you. It means you have a cylinder of protected airspace around you where no other IFR traffic should be. What about VFR traffic? They are still allowed in your “personal bubble.” IFR and VFR traffic are altitude separated by 500 feet vertically. At least, as long as the VFR pilot is actually following the rules (and its shocking how often they don’t!) and assuming they are on a good altimeter so their altitude is accurate. It also assumes you, as the IFR pilot, are...