Re: Global warning
It's not 'everyone' I'm afraid.
However, we do have some clumps of users in our org where Teams seems to be CPU hungry, but certainly not all.
We have approximately 4500 laptops in the org, none older than 5 years, and a mix of specs, from boggo standard i3's(poor users) to i7's to some fancy Mac book pros ("I'm a UX designer it MUST be a Mac"), and a sprinkling of Ryzens.
There are a group of 'shouty' users that frequently report that their Teams is slowing down their ability to work - there are about 45 of these users from across the company. We've yet to bottom out why some are more affected than others. The users in question are from across the spectrum in terms of roles - from devs, to kitchen staff, to c-suite, to finance etc.
There is also probably a good chunk of staff who just accept that Teams seems to slow their machine down a bit but just shrug and get on with life without logging a ticket with the help desk - so we lose out on those data points.
Teams used to be total crap, now it seems to be slightly less crap (or people have just learned how to work with it better) but to say it smashes CPU on all devices is just wrong.
For a bit of balance, Zoom issues generate more help desk calls than Teams in our org