Additionally, due to the way that the allergic sensitization process happens - many people only develop a reaction after frequent, long-term exposure. So it's v

Additionally, due to the way that the allergic sensitization process happens - many people only develop a reaction after frequent, long-term exposure. So it's very possible to use a metal laptop without experiencing an issue for a long period of time, and then to develop problems down the road. This, along with the allergens sometimes being from contaminants in the metals (so not listed and somewhat variable) - makes it very hard to predict and to identify afterward. So while I'm "rare", in that I know I've got an allergy with a very noticeable reaction that can be triggered by laptops - many people don't know that they are at risk of developing it, even though they are. Or maybe they know they have a nickel sensitivity (this issue is very common with people who wear cheap jewelry) - but they don't know a laptop can trigger it. Unless there's a big push to do some sort of widespread contaminant testing on laptops, I imagine this issue will grow if metal-body laptops continue to be the norm.