Mattermost is a decent business-ware option. You can even self-host it.

My company actually switched from Mattermost to Teams, and I don’t really see any functional difference in daily use, except that there’s now more intrusive “features.”

I think it’s more akin to indoctrination. “You, too, can be independently wealthy if you work hard enough. Just look at these very abnormal billionaires!”

And this, Tim, is why I spend most of my money at Steam.

This may shock you, but proudly parading that you want to fuck over consumers at every opportunity is not good incentive.