Does this apply to Slack as well?
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 gargantuan budgets, extensive engineering headcount, and rich product ecosystems to pair these features with.
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.
I would never want my production deployment rollback tied to my instant messenger plugin working.
Not every integration makes sense. I know some companies doing business logic automation in Google Docs, and I'm also reminded of Twitch Plays Pokemon. Just because you make a choice to integrate with a product doesn't mean it's widely adopted, practical, or wise.
Or supported.
Edit: I want to clarify. I don't mean to be rude, and I wasn't in the room when y'all made these decisions. I just don't think Slack is the ship you want to tie yourselves to, especially not as your control plane.
Sorry, but I have to post this now:
https://github.com/learnk8s/xlskubectl
"xlskubectl integrates Google Spreadsheet with Kubernetes."
"You can finally administer your cluster from the same spreadsheet that you use to track your expenses."
It's a (working) joke of course, but a hilarious one.
Quick math, assume one tool is charging $8 per employee per month (meaning $100 a year). It only takes one million customers to be a billion dollar company ($100M yearly recurring revenues at 10x valuation).
And one million customers is just a couple of fortune 100. The whole market is orders of magnitude bigger than that!
So Google? Microsoft might count too, but I haven't used their suite in a while.
Also, I would think integrated email would be necessary too.