Teams is dreadful and often causes my 2019 i9 MBP to grind to a halt by sucking up like half of my threads in some weird way, causing it to throttle down to 1Ghz.
I'm not expecting much change when I go to Apple Silicon tbh, it's just bad software.
Earlier linked complaints are prior to the native launch last August, which initially wasn't great, but has improved to the point where resource utilization on an M1 is now an non-issue. You'll be pleasantly surprised.
I'm on Teams calls most of the day switching between my 14" and 16" pros and have nearly my full machine available to me, totally cool/quiet. Right now it's in the background and iStats says is only taking up 3%. On meetings it typically is around 30% on a core, with video maybe up to 50%.
Complete night and day difference from the prior 2 years where I had a similar experience to you on a 16" i9, constantly in a stranglehold and had to be restarted 4-5 times a day, battery sucked dry in 2 hours. Now it's restarted every other day due to some weird functional bug.
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