https://answers.microsoft.com/en-us/msoffice/forum/all/teams...
There's a screenshot in there showing it taking 22GB of RAM. I've personally never seen it go that high, but the 10-12GB of RAM that I have seen is absolutely ludicrous for a chat app. Even when it's initially started it takes over 600MB. Combine that with a few VMs that also need a few GB of RAM each, as well as another equally-bloated Electron app or two, and you can quickly get into the swapping zone.