Would be nice to have the FP5 screen on the FP4 ! 
Especially if I break my FP4 screen I ll be glade to get the OLED. The current screen is a little underpowered for outside reading.
I’m closing here, as this was discussed already (FP5 parts for FP4). Please search and use one of the existing topics to discuss. Should I stumble over one I will link it later. Thanks for your understanding
https://forum.fairphone.com/search?q=Parts%20interchangable%20order%3Alatest
https://forum.fairphone.com/search?q=Moduls%20interchangeable%20order%3Alatest