My very-large project switched chat apps in one weekend (backed by a few weeks of prep by IT team). We had JIRA integration on day one, and one or two missing things within a week. It wasn't that big a deal.
I think Slack aficionados overestimate how much investment most companies have in custom integrations and bots and things that increase switching costs.
I think Slack aficionados overestimate how much investment most companies have in custom integrations and bots and things that increase switching costs.