All Unix-like systems have made a lot of mistakes. There is a chance to fix them. Here is the list of some of possible improvements: Pointer + size strings in

All Unix-like systems have made a lot of mistakes. There is a chance to fix them. Here is the list of some of possible improvements: Pointer + size strings in APIs (not null-terminated strings). Asynchronous APIs as default choice. Proper process spawning, not forking. Restrictive process rights management (with each process seeing only a slice of the whole file system and overall system resources). Non-monolithic design (with no need to integrate all drivers into the kernel). Probably many other improvements.