> ChromeOS is by default more lightweight than traditional Desktop OS

Maybe? The shipping ChromeOS on the Lenovo ThinkPad C13 Yoga Chromebook (R7 3700C/16GB RAM/NVMe disk) is a dog. The system is nearly unusable. Can't even play YouTube videos properly, lags out with a few tabs, and maxes out the fan and practically freezes once you start trying to run serious Linux applications under Crostini. However, once blasted with MrChromebox firmware, and loaded with openSUSE, it runs very adequately. In fact, I'm posting this from inside Firefox with 17 tabs open, plus two instances of Okular and a kernel build running in the background, with no issue.

YMMV, I guess.