The chips themselves will probably outlast their users or at least their own useful lives quite comfortably at 100°C. If sat on a desk, not in something mobile.

The chips themselves will probably outlast their users or at least their own useful lives quite comfortably at 100°C. If sat on a desk, not in something mobile. Heat cycling the motherboards will definitely shorten their effective lifetime significantly. There's no reason not to have proper cooling. Having said that, modern Thinkpads are not great in this regard either.