Just throwing out there but has Slack genuinely improved the work lives of anybody? I've used it for my past two jobs and have yet to find a way of using it that doesn't destroy my productivity or make me genuinely afraid of receiving a message and being thrown off what I was doing.
I mentor other people in my field via multiple slack channels.. and I have seen the results of that turn into new opportunities for work and new opportunities for my employer.
Slack has its problems, but what it enables for me is incredible.