This person fundamentally misunderstands RAM on Windows...
Apps reserve a portion of the total available memory. That memory is not necessarily in use. Memory not in use will still be available to other applications as soon as the system reallocates it when a given application needs more. Usually of you have more RAM, applications will reserve more of it. You can check a better explanation of your current memory usage in the windows resource monitor. You'll see memory allocated, memory in use, and memory being used to cache data (which windows does to reduce disk reads and writes), as well as memory completely unallocated. Chrome can easily allocate 1/3 of your total available memory by the third tab, but that doesn't mean chrome is actually using that much.
