MacOS tends to use all the ram it has available but that doesn't mean it needs it all. Much of it is used for caching and the like. It's a good thing, since if

MacOS tends to use all the ram it has available but that doesn't mean it needs it all. Much of it is used for caching and the like. It's a good thing, since if you're going to be powering the RAM you might as well use it all, even for marginal benefit. That means though that if you had 64GB of RAM on your next MBP, you'd be (hopefully) running at 53.4GB used.