Yes, you could point the feature to use any of those well known services, which takes out takes out the friction of a bunch of steps to archive content, which is always good.
Those archive services also get around some paywalls out there. How that happens I have no idea but it’s a secondary benefit 
Firefox has a plugin that allows a more one click approach to archiving of sources (thought hCaptcha still add friction) but if you could combine that kind of one click action and benefit while you post in discourse… Whoaa! 
Productivity to the moon! 
