EDIT: I don't like the term 'soy boy', just picked 'soydev' for a lack of a better word, intending to use it semi-ironically.
recently I saw a project move PR discussions to discord, like what's the point of using a git forge at this point, you can as well just use git send-email
I worked at the server company that previously hosted discord servers (no longer exists) and let me tell you right now that all your conversations were accessible on the server to anyone in the company and completely and totally insecure. Overall security was pretty meh and it wouldn't be very difficult for anyone who really wanted the information to gain access to anything on your server.
It is not a valid place to store or discuss anything that requires operational security. It is also not a place where customer data should be stored or discussed, in fact you're also probably breaking gdpr by accident if you ever do so.