Not sarcasm. I'm entirely annoyed with the software industry's constant attempts to make money off problems that were solved by someone else decades ago.

I'm pretty sure this recent instability won't make Slack go out of style. What will likely happen is Slack will continue releasing "features" that don't improve upon IRC and make their product harder to use, until someone else comes along with a simple IRC clone and unseats them just like Slack unseated HipChat. It's an exercise in pointlessness.