Great question! We do use huddles sometimes, especially when a Slack thread starts to get too deep. They're wonderful for pairing on problems. I'm sure we could migrate to huddles for standups if we really wanted to, there's just more momentum in Zoom meetings.

But I will say that Zoom integrates nicely with Google Calendar, offers video, and like you said has a higher limit.

We're also experimenting with doing standup three days a week so we can have less time spent in meetings each week.

Slack huddles have poor ergonomics what with their use of global keyboard shortcuts. I avoid them whenever possible.