SaaS are not going exctinct. This reminds me of the LinkedIn posts saying they clone Slack in two hours, copying the UI, etc. Yeah, if you think Slack is private chat rooms then you should use IRC for your company.

One of the most valuable things about Slack is the ecosystem: apps, API support, etc. If you need to receive notifications from external apps (like PageDuty or Incident.io or something like that), good luck expecting them having a setup for your own version of the app. Yeah, some of them provide webhooks (not all of them), but in the end you have to maintain that too...

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