Comment not related to OP's wishes but I miss the 16:10 laptop screens of 2010 extremely hard. It's the one thing I miss about my HP 8740w.
This is my first Linux notebook after ~4 years and I am really blown away by how easy it was to set up!
Not sure what you mean by keyboard flex, but so far, typing is really good...I am mostly using this for text work (research papers, proposals, presentations), so the keyboard sees a lot of use.