One of the first things I ever did online (decades ago) was IRC, and I still like text chat. It's great for those of us whose wits are quicker and who hear better in text, and it's also important when you don't have people around with whom you share ideas. Of course you have to keep opsec in chat, but you should do that everywhere.
I've stuck my head in the f/anarchism chat a few times today. While people are logged into the channel, all I see are join and leave messages. Is this just not used for public chat? I know there are various Discord servers occasionally promoted on r/Anarchism, but I really don't like Discord.