Re: @gritzwally
That when you set it down on a desk, it does not creak and bend and it stays where you put it.
And when you knock it off the desk and it hits the concrete floor, it keeps chugging along calmly with no damage.
Oh, and all the Thinkpads (IBM and Lenovo) I've had were user-serviceable. Service manuals available online, straightforward disassembly, etc. I've replaced drives, memory, fans, etc. In this day and age that's a rare trait.