Memory protection was basically impossible or at least "Research Level Hard" on the Amiga, because of how the OS was designed with linked lists and message passing of pointers. This was what made it so fast, but at a cost. (They would have needed something like Rust to balance that.)
Everything could have been fixed with the March of Moore. The OS could have gotten a hypervisor and been running each program in its own "VM" thinking it was the only program on the machine.
