And I'd have expected MIL spec temperature range and part screening. What I'm wondering is if the article just left those bits out; I skimmed it and didn't see a definitive statement that it's really a stock, off the shelf item, exactly the same as you or I could buy. We can buy an item with the same functions and interfaces (electrical, logical, and physical).
Indeed, which is why I'm only talking about parts upgrades, not design changes. Back in my satellite days, we used MIL-STD-1750 based onboard computers long after they were obsolete. We only switched to something newer when we had a specific onboard function that needed it, and the 1750 chips were damn near impossible to find.