I understand the appeal of a Discord server, but I think it's too chaotic to keep up a thread of conversation for days or even weeks. Since everything goes into one channel, any kind of smalltalk quickly makes deeper discussions get swamped away, especially when memes are included. Whenever I open Discord and go into any of the servers I subscribed to I see "100+ new messages", so I just ignore all of them. Discord is nice to have a quick smalltalk, like IRC back in the day.
Having Disqus or something similar below each new page would be a nice compromise between Discord and a forum, because you can always choose to respond to specific comments, so there is some order in there. Also Disqus makes it easier to see which page a comment refers to.
A forum is more suited for comics where each page creates 100s of responses, like OOTS, Erfworld or GrrlPower (though the latter doesn't have one), because in those cases a lot of insightful speculative threads are created in addition to reaction threads as well.
But something like a chat thread could easily be moved into a Discord channel.