Counter-counter point: people don’t get a Mac or windows laptop to learn about osx or windows. They generally want to run software or at least browser to do what they need to do.

Uh, memory metrics in Linux are a pain. The only tool that reports most cached as available is htop. free, top and a lot of other software (like node_exporter) will report that a lot of cached memory is not available.

To OP: don’t worry, a lot of Linux tools are smart enough to give back memory if memory pressure rises.