> What does it mean to be worst-in-class for text chat

I expect a chat program to show me all messages the have been sent in a chat, in so far the other party intends me to view them (have no been deleted etc.). That is not an expectation Teams manages to fulfill.

I expect an edit (mine or someone elses) to be reflected on all my devices. That is not an expectation Teams manages to fulfill.

I expect to do the same series of keystrokes in a blank "chat input" field and get the same result. That is not an expectation Teams manages to fulfill.

I expect the text that I see as have been sent to appear the same (for a reasonable value of "same") on the other persons screen. That is not an expectation Teams manages to fulfill.

I expect that if I scroll to the bottom, I will be able to make the last message intended to be visible, become readable and copyable. That is not an expectation Teams manages to fulfill.

I expect that when I select a text and press "ctrl-c" or the local equivalent, the text now in my clipboard is always predictable. That is not an expectation Teams manages to fulfill.

And yes, I have personally seen and experienced each and every one of this things.