The problem I see here is why would I use these products when I can just create my own? But maybe it would also help to organize them by category and capabilities, try to sell them more on what they solve..
The usability in Teams always feels bad to me, like it was designed and developed by someone trying to be fancy without being usable.. Text content in chats is in a strange light gray color, messages are collapsed by default so you have to expand them to read anything longer than a few words, then requiring a "title" for every message.. Slack just feels more natural to me, more thought-out..
Agree that there are downsides, also that the tasks never end, regardless how many you outsource and how many more theoretically can be completed now.. Somehow it encourages quantity over quality.