I've not heard of any research that shows that it's impossible to have meaningful conversations on these platforms.
And please note the distinction between "it is impossible to have such conversations" and "some people (especially less tech-savvy people) have a harder time having such conversations" on these platforms.
Teams/Slack/Discord/etc is just another communication medium. Once our society has, collectively, had more of a chance to get used to them, and once we're no longer dealing with an entire generation who were bad managers before the personal computer even existed (</hyperbole>), I wager you'll see a lot less complaining about the medium itself.
OK: all three of those are specifically about "Zoom fatigue".
None of them in any way address the issue at hand, which is the ability to engage in meaningful conversations over online platforms such as Teams and Slack.
> Except you don’t actually talk (as in have a real conversation) with anyone on Teams.
That is the specific argument that I am refuting: that your experience of not being able to "have a real conversation" on Teams, etc, is universal, rather than just being your experience, which cannot be extrapolated from without gathering significant extra data.
"People get Zoom fatigue from having too many video meetings (especially in the first 2 years of regularly using video meetings after never using them before)" is not the same thing, and does not prove that these technologies are impossible to use as a replacement for in-person meetings on a wide scale.
Not completely wrong, but…