Your’re correct. Even though this is an older topic, the logic is still the same for current releases.
Stop is only with radio stations, where the stream is actually stopped as pausing a live stream is a bit weird to do. Playing from a local storage, stop/pause is actually the same function.
There is no additional read./writing to your USB thumb, when put into pause.
On top, volumio doesn’t write to the USB it read’s. There is a bigger change that you expand the lifetime of the USB device, than see effects of a reading action.
The only effect that can happen after great number of reads on the same cell, is that the near surrounding cells are getting charged (called “read disturbtion”). But then this part is handled by the flash controller, if certain cells reach a certain read count (threshold) , the content is copied to a new location.
Hopes this answers your question.
(I’ve removed the last four entries, to keep everything on topic)