I dont think you get it. WMI makes a heat soaked IC irrelavant, you still get iat significantly lower than ambient. If you monitor/log IATs you will be surprised by how little the difference is between ICs compared to what wmi provides. I have a video where on a 45F ambient day my IAT goes from 60F to 25F. The systems are cheap, robust with failsafes. You can also buy premixed WM botlles these days, its so easy to use. Factor in 10-20% more power and better "health" for your engine.
As I said if you have the money and want a bigger IC as well - go for it. I used to think like that, then learnt it was not money well spent.