I hear that this old plugin is going to be phased out, any one know of any time lines of when this might be? Or have i heard incorrectly?
I'd believe you probably heard incorrectly. No official word like that and a LOT of organizations still bind. So it'd be a huge blow to Apple in some enterprise organizations.
I haven't heard they are doing away with it, but they had/have Apple Enterprise Connect and now the Kerberos Extensions in Catalina and it's pretty well documented that the current binding plugin is not the greatest.