But I think this is only a problem from a UX standpoint. IRC has DCC, for instance, but it's a matter of building a client which e.g. inlines DCC "attachments" or displays images beneath messages with links. If IRC is truly "revived" there's a chance IRC clients grow or new ones emerge to keep up with "modern" IM systems, and IRC will still have more benefits than these (openness, ubiquity...)