Yesterday I had 2 Zoom meetings. Both warranted a restart with Big Sur. I have a 13" 2020 Mac, 2.3 Ghz quad-core I7 with 32 GB of Ram. It crawled my machine to a stand still. I am using version 5.4.3 of Zoom.
I also had a font issue with Chrome when using goggle search. It turns English to Welsh. I took out Roboto and that fixed that issue.