I've never seen a serious startup using discord as their comms channel, but many with Slack. This makes sense too: Discord was originally built for gamers, whereas Slack was built for startups.

🎯Exactly people have always tried to get me to switch PL chat to discord but it always felt exactly what your describing. I prefer Slack because it forces a more productive business environment. Even if it’s lame people don’t get out of line with how they speak. 

AskSN

Do You Use Discord?

I don't use it since a decade or so.

Discord is echo chamber paradise and it operates like a honeypot, kind of like Telegram.

_If you want to start a cult, completely gaslight a large group of people into whatever flavor of extremism your brain appreciates the shortcuts for, this is the platform for you. Just know that everything you say on Discord will be used against you and you may very well get arrested._