> After thinking about it for a bit I decided to remap all the arrow keys using Karabiner Elements . I disabled the right arrow key and mapped capslock + J K L I. And donated $10 to the project. A small price to pay to postpone a very expensive repair bill.

Great idea! Though I'd suggest to use RightCmd instead of Capslock, it's more ergonomic - you use your right hand just like before.

(and yes, it's both insane that the hardware is not repairable and that the OS software sucks so you have to use some other apps)