During the meanwhile ...
... I learned IRC nearly 30 years ago, and it hasn't gone down since.
Email still works as a near-realtime collaboration tool, too.
Reinventing the wheel ain't all it's cracked up to be.
Slack has suffered an outage that plunged parts of the world into conversation or less-pretty messaging platforms for a couple of hours. The horror manifested just as the United States West Coast darkened in preparation for Halloween, sending tens of thousands, including Reg operatives in San Francisco and Sydney, scrambling …
I learned IRC nearly 30 years ago, and it hasn't gone down since.
... until you get a netsplit.
For the record, I also would be happy with IRC, which does the vast majority of what people need (apart from some essential features such as giphy), but Slack is where all the cool kids are these days.