I had some buyers remorse for my 2017 12.9 ipad pro. I came to not like the pencil for writing, missed
keyboard undo's and hated that the ios apps lacked instant cut and paste integration with my windows
desktop computer. I went back to my 2013 13.3 vaio duo--which has a much more realistic pen feel for
handwriting. However, I grew to value the ipad for artwork: the aspect ratio is much better for
art than the duo's 16:9, the pencil feel is less of a problem sketching, and instant integration is less
important.
Even if you give up on the 12.9 pro, you can likely sell it for at least $400-$500 or more.