Well yeah, but it's not on steemit blockchain and how do you send messages to all your followers from there to steemit? The usernames do not always match steemit usernames and you have to send messages to each one individually.
Anyway discord is great in it's own way. There is a convenient tool for everything, depends what you want to do and achieve. If discord does the job for you then of course use it. Skype, twitter, facebook, instagram, telegram, whatsapp there is lots of stuff you can use that is free.
right - you are correct - I did not think of that - that it would be nice to send out a msg to all followers... I guess I just have accepted that I can't do that - instead I make friends with the ones that I can one-on-one and then we talk in discord