[PaulDavisThe1st]

> Someone who would make a new OS, should define a completely new system call interface, as it is likely that now it is possible to conceive a better interface than 50 years ago and anyway if it would not be different there would be no reason to make a new OS, instead of modifying an existing one.

For an example of how things like this can be done incrementally, you can look at io_uring on linux.