the IBM ThinkPad 235, a cult classic subnotebook released in late 90s. IBM engineering made incredibly compact machines like this one, which was exclusive to the Japanese market. There was time when IBM and many consumer products were made with industrial design teams and user replaceable parts. Sadly that era is gone now. Anyway, i am sharing this for nostalgic reasons.
the worst part is lenovo trying to copy Apple without understanding why people brought those thinkpads.

@nixCraft lenovo laptop ranges is much wider than what was available from IBM (and includes some shitty machines)

But they still have a very decent range of ThinkPad that are some of the most repairable of the market. Not as extensible as before (but it might be also a consequence of the deeper integration of components).