my first professional experience with linux came doing tech support for ubunu & red hat on thinkpads.
this was the mid aughts so they were t40's, t60's & x60's and i always marveled at how well they were engineered; you used to be able to swap out the hard drives, keyboards, displays & cases without tools (but it was easier if you had atleast a screw driver around).
it was so easy that it would be one of the first things that we would do to minimize amount of time that the engineers spent getting tech support. if they had even the slight tangentially hardware related compliant like slow wifi; we would almost automatically pull out the harddrive and slap it into another shell and send them on their way.