i'm still running my dell xps since 2010 albeit the display is now fubar so i use the external, the point is that it's still a workhorse after all these years
maybe an impurity, i agree, not an issue. pu238 is an alpha emitter so it's only an issue if you breath eat or eat it. and it's easily detected in the river., which it never has been.
a framework laptop with ubuntu (and virtualbox for the classes i teach), a macbook air with parallels (windows, kali, and ubuntu), an old dell xps, and a customer issued dell with win 11 on it. by far my favorite is the macbook air.