I'd style my way out of that argument by saying out reliance on tools like Slack rather than other pre-planned work builds a reliance on that one tool for all t

I'd style my way out of that argument by saying out reliance on tools like Slack rather than other pre-planned work builds a reliance on that one tool for all tasks being done "in the moment", which then means it's relied on as the medium in live production issues. If there was a lower reliance on IM for all tasks, other solutions for crisis management would be utilised (potentially).