There used to be a news group, comp.sys.apple2.gno, to which there was a monthly FAQ posting. That newsgroup is now defunct, however the FAQ is still available.
It is available in two formats: HTML, and text.
When the FAQ was still posted to comp.sys.apple2.gno there was also a change log available. Since the FAQ source is now available the GitHub source repository, that repository can be used to determine the FAQ change history.