Now I’m the first to say I find synchronous communication (eg Slack) to cause massive productivity loss for an organization & can also cause employee burnout … but how do companies that have a culture of async communication not fall into a similar bad issue of email overload?
The past 3 years I was able to leave for the day with no unread messages.
The last few months I am unable to keep up. ~20 unread messages and several unanswered Skype chats each day.
Other team members also noticed an increase in the amount of mails.
So to me synchronous comms are comms that can't be consumed asynchronously. The only text version of that I can think of is an exploding Signal message or similar. Any non-recorded video message is synchronous.
Slack can be both depending on the situation
Calls are definitely sync, although I guess voicemail is async