I'm not denying that it's a complex or costly process, just lamenting that they don't care enough. Of course, the problem is compounded for me by the fact that at any given moment I end up having 3 different enterprise chat apps open on my work laptop for collaboration with outside parties.

And the result of that knowledge is a worse experience for users. However you frame it, users are losing because MS doesn’t want to shell out the cash for good UX.