[ggm]

I tried "what does the body do with excess fat" and I think it covers it. For sure, you get higher triglycerides floating around in the bloodstream, and the liver is under stress. at the extreme end, its Steatorrhea which is .. unpleasant (olestra goes to the same place)

The lymphatic system is also involved.

So it's not entirely "eat as much fat as you like" by any stretch. It's more that over time, the body tends back to a baseline model. Continual high levels of fat which cause surplus in the bloodstream are heading to arterial blockage and isn't good, but the relationship of fat ingested to fats in the blood is a more complex path. "it depends"

I'm not a bio scientist or a med. Happy to be corrected.