My unpopular opinion: free ram is useless ram. Go on, OS. Put evertyhing into ram. I have 64GB of it. Fill it the fuck up. I want to be able to open things blazingly fast, that's why its there. The trick is leaving enough so new things can fit without waiting for cleanup. And windows isn't bad at scaling its usage. Afaik, wIndows installation on 8GB will use less than the same installation when 16GB is available.
If you had unlimited ram, you'd be mad the OS was wasting time cleaning up behind itself.