> For a chip designed to last 30 years, high ambient temperatures reduced the life expectancy an extra 10% a year, so after one year the lifespan dropped to 26 years, Pateras said.
If after one year, it should have 29 years of life left but instead will last 26 then it sounds like the chips won’t last 8 years (instead of 30). Sounds bad to me.
If the math is correct, you'd have an expected life of ~10.2 years. (30*(0.9)^n - n) = 0.
That said, when someone says "it reduces the lifespan by 10%", I'm a bit skeptical of the math. Either they are not properly testing it, or the temperatures are exceeding silicon parameters.
Doesn’t sound too bad?