I replaced the terrible 1366x768 panel in my ThinkPad E530 with a FHD panel from a W530. Easy swap and it all "just worked". So even in the Lenovo era they're very easy machines to work on.

Edit to add: Obviously this is an i5 laptop from 2012, much newer than some of the other machines in this thread. Although it's not my daily driver anymore I do still use it for music production.