I've used an X200 for ten years (I bought it used with 3 years on the clock) and I'm actually surprised that the X200 is kind of glorified nowadays as one of the best Thinkpads ever, because back then the X200 was decried for its numerous build quality issues (palmrest, right half of the keyboard, thermals, noise etc.). The X200 is of course build fairly well compared to the more recent models, but that's hardly surprising. From my PoV the Thinkpad series has been constantly and consistently reducing build quality for at least 15 years.

(That being said most of the issues the X200 has had were just things that feel poorly, it won't fall apart)