There are issues of course. I’m just of the view that answering questions and giving support to a project is perfectly fine on discord because of incredibly fast response times.
As a developer you really only have bandwidth for maybe one or two methods of communication until you get stretched far too thin. Discord combines threads and irc chats into one. That is incredibly productive from a support standpoint.
To me this is nothing different than asking someone to join an irc server for technical help. Most of the irc servers I followed no longer exist but the projects are still fine and they’ve managed. If anything it’s better because you actually have a search feature.