WhatsApp is the worst app on your Windows 11 PC right now, eating 1.2GB of RAM doing nothing
(www.windowslatest.com)
Why Edge? (Still Chrome)
Why Claude?
WhatsApp depends on how much TEAM your PC has and what other software is running in order to change its cache. Maybe the tester/author has a lot of RAM and saw this "huge" usage.
Personally, if I bought 64GB of RAM, by god I'm going to use it!! Why buy lots of RAM and be stingy??