It seems like most people now days prefer to go down the Discord route rather than having a forum. Though I am part of a few communities that have both a forum and a discord server. I don't have a discord server, I feel that forums are better for communication since real time chat just seems to get lost to time. (Especially if the server is very active.)
However, 50% of members on discord aren't even members on the forum since I use discord for many things rather than the site. I like to keep the forum more active rather than all members using Discord.