I'm unsure why any company would prefer Workplace over Slack/Teams etc. They have far more features and basically not scathed in privacy troubles as FB is in right now.
“More” doesn’t mean better. As an ex-fb employee, I genuinely liked workplace as a replacement for slack. It forces a fundamentally different workflow, but has some very clear advantages — e.g. groups suck for near real time chat like slack offers, but is a much better format for long term search.
Workplace is more like an intranet, whereas Slack is more like email (in terms of how it’s used). That said, my experience was that the Facebook layout makes people treat it like Facebook - sharing and liking good news stories, but all the serious stuff is done elsewhere.
