[wtetzner]

Not only that, but it means if the library crashes, your editor process dies. That hardly seems better than sending some text over a socket. At least if the external process crashes, your editor can just restart it.

[jblow]

Several people have said this. Look ... a "crash" in a modern operating system is a recoverable exception.

[wtetzner]

How do you recover from segfault? How do you know what data might be corrupted?