See this about the multi monitor stuff on macOS: https://news.ycombinator.com/item?id=31361974
It looks good, it's fast and feels professional. The jankiness I used to associate with desktop Linux just isn't there. It's actually stable and reliable, whereas on macOS, I'd run into issues with Bluetooth, or with WindowServer or some other opaque macOS service hogging 100% of CPU time for no apparent reason. Linux tends to have better hardware support, as well, especially for older hardware that might have older drivers that don't support modern macOS.
I'm of the opinion that if someone's needs, even a layman's needs, can be satisfied with ChromeOS, then Plasma Desktop with a browser would satisfy them, too.
The closest I have seen to creating a good experience was Ubuntu Unity.
I noticed it being used in universities, and in the office I used to work at.
I'm disappointed that the Unity project wasn't taken forward, and it seems to me that Gnome just reimplemented it, but missed many best parts of the original.
Many years ago, around 2006-2008, my PC exclusively ran Slackware after saying goodbye to XP. It wasn't really beefy, so I installed FVWM. I could do all the university assignments on it. Internet browsing, multimedia, USB plug n play, printing etc etc worked fine. Guess my use cases were kinda minimalistic.
These days I mostly work on Mac, but still have a headless Linux PC running for personal tinkering. Probably I need to have another taste of Linux desktop experience :D
Try out modern Plasma/KDE, it's actually really nice. I say this as someone who has disliked KDE for a very long time before using Plasma.
I use Linux when I specifically do not want a desktop. A headless server.