And since we actually pay for Google Workspaces, we could switch to their chat solution. I haven't actually bothered even trying that so far. Because they'll probably cancel it in a few years. And there are a gazillion alternatives. I've used everything from news groups, irc, icq, hip chat, discord, etc. in the past quarter century or so. And that's just for work related communication. The main reason for me to use Slack is that it's there and cheap and it kind of works. I have no big pressing need to switch. Or to pay anyone for this stuff.
Slack was the cute sexy new thing about ten years ago. Then they got acquired by Salesforce and now it's just yet another corporate thing; so enshittification is a given. But they might want to remember that the only reason they got this big is through their generous freemium offering. Cut that off and the rest just bleeds out as well. Along with all the revenue. They wouldn't be the first chat solution that joins the ranks of the once big and long forgotten.