I use my mirror for knowing where approaching vehicles are, motorized or not, far back of me long before I can see the whites of the drivers'/riders' eyes. I do not usually need to continually track them until they pass.


Sometimes I use the mirror to hang my ball cap when not in use, or in the past year, a face mask.
​​​​​​
Other riders use their mirrors for whatever reasons they have and not necessarily for the reasons deemed correct or important by other cyclists; reasons which may not include making eye contact or otherwise communicating with every bicyclist who passes by.