I think most companies wouldn't have an issue to fix a design defect for free because most laptops can be cheaply serviced.

On a Lenovo you can easily replace the keyboard becuase it is not rivited into the main case. You could also replace the display without the entire case.

Back in 2014 they issued a recall for batteries... They expanded it in 2015. IIRC it's still valid today if your battery is the original one. IIRC there wasn't any issue, but there was a risk in the design that could pose a safety hazard.

They also recalled some devices for a battery enclosure problem again in 2018. Same deal: no issues, but there was a manufacturing defect that could have resulted in an issue. It was a loose screw.