If your team is on-call and incident management could be improved, just try putting your team in a Discord room and see what happens. Don't put managers in there, just the engineers.
It works great.
Slack just added this recently: https://slack.com/intl/en-de/help/articles/4402059015315-Sta...
Huddles are more like the audio calls Slack already had, but without the channel notifications.
It lacks the auto silence that Discord has, so you can't just hang in a huddle waiting for someone to talk. There's a constant hiss.
I guess they might change it, but didn't sound like this was something they were even thinking of as an issue when I spoke with a representative.