Earlier quoted context omitted.
Does this apply to Slack as well?
Absolutely. Chat is not a multi-billion dollar company. Video conferencing is not a multi-billion dollar company. File hosting is not a multi-billion dollar company. The company that does all three of these things in an integrated fashion is. No single feature constitutes a platform or ecosystem, and there's certainly no defensive moat. These single-purpose companies are just minnows to the bigger fish that have garg…
That's a naive perspective of the role Slack plays in many organizations.
For example, much of the monitoring and alerting workflows in our company run through Slack. We use it more than email. We can rollback production deployments with Slack commands as well as interact with our staging environments - and that's just the tip of the iceberg for the workflows we've built out with Slack's APIs.