Thank you. I will fight this new trend of 100% Slack/Teams/Etc. as long as I possibly can.
Email provides a barrier between you and the work -- email isn't a real time form of communication. Chats, meanwhile, imply immediate response. Hell, these apps even show when you're active -- I've gotten passive-aggressive messages like, "I know that you have DND on, but can you confirm you're seeing these messages?" chats outside of working hours.
I get why Slack/Teams/Etc. is a great supplement to email, especially when it's a smaller internal team collaborating. But ditching email is a terrible idea.