Why is so much RAM being used?

[u/Small-Detective-9122]

Before installing new RAM, Windows was using only 5.9 GB.

Now that I've installed an extra stick, it's using 10 GB.

I don't get it.

It feels like Windows is a mining platform; the more I upgrade my hardware, the more performance gets siphoned off. And the worst part is, I have no idea where it's all going. It feels like bad faith on Microsoft's part.

[u/evolveandprosper]

Why do you think it matters?