Re: Email already passé?
The problem with Slack/Teams/Hangouts etc. and FB/WA is that they are all siloed. You have to be on that service.
For example, WhatsApp breaks GDPR and is theoretically illegal to use in Europe (although millions still do). So we use Signal and Threema, but their penetration is small, compared to WA.
For Slack and Teams, when it is internal communication, as long as the user has Teams etc. you can communicate with them. External is more error prone and makes people jump through hoops.
Email is universal. All servers"speak the same language".
Biting the hand that feeds IT
