Replacing email completely is an arduous task, if not impossible. You can replace email for internal communications, via apps like Slack, Microsoft Teams, Googl

Replacing email completely is an arduous task, if not impossible. You can replace email for internal communications, via apps like Slack, Microsoft Teams, Google Groups etc, there still needs to be an email interface with everyone else outside the company. Everything is so tied to email, such as it being a primary identifier and login for most websites. Having said that, email is becoming less and less relevant for communications. Businesses are relying more on other forms of asynchronous messaging like on-site chat, SMS, WhatsApp, Apple Business Chat, Facebook Messenger, Push messaging, conversational support platforms, etc to communicate with their customers. I think apps like Slack will continue to be more effective and popular vs email for internal use, while email will remain king for external communications.