I feel like it's one of those all or nothing games. You need allll of the resources to make it really work.
I'd use more RAM rather than faster RAM for it but faster RAM can't hurt.
Yeah, I agree, but whether it is worth doing for an i5-8600K, I have no idea. Probably not when already owning 28GB. It seems like a game that will be easy to run in 5-10 years, but they overegged it on current hardware.