Years ago (~2010) I learned that companies sell laptops which can't cool themselves properly. I had an Acer "gaming laptop," which from the factory had fans which didn't sufficiently cool the CPU. After about 2 years of normal use, it cooked its thermal paste, and would shut off under even moderate use / stress.

This is obviously a different situation than what's occurring with Dell laptops, but it's not too far afield. When I bought the Acer, I never even considered reading up on cooling. I figured I'd only have to understand cooling if I built a computer myself: surely one from a manufacturer would already be able to cool itself sufficiently. Well, it turned out I was wrong. Keeping laptops cool is actually a pretty tough engineering problem, and too many companies and consumers aren't will to pay the price (either in higher dollar amount, or constrained capabilities) to ensure that this a standard.