we have polar opposite opinions on email and slack/teams/discord! im not sure i am even understanding the issues you brought up about email correctly.
may i ask what age bracket or generation you are? only if you're comfortable sharing, of course.
im in my 60s. and im curious if our difference of opinion here is a product of what technologies were/are available during the start & prime of our careers. i very well might be in stubborn old man mode subconciously.