To clarify, some versions of Linux are lighter weight with resources, and macOS does tend to take up more RAM at rest to make things pull up snappier. But their compression algorithm is better, and if you are using near the limit, it will be more efficient with the use of the RAM you have available before lagging. With Windows and Linux, it feels more like if you’re out of RAM you’re out if RAM. It’s less likely to happen at all on Linux though.