IRC, email and XAMPP solved messaging a long time ago. Derivative products built on these protocols should have solved the chat problem for most orgs, but we got complacent and thus vulnerable to nickle and diming by the likes of Saleforce and Microsoft. Now rug pulls by faux-opensource projects that basically want free labor for their commercial project so they can sell it to bigger fish.

It's not people wanting to make more money that I despise. Fine, make your commercial version ten times better, I don't care. But the practice of crippling your opensource offering by removing features or adding limits is evil and shameful.