It comes from mistakenly architecting systems as monolithic entities. No one would run a major website serving millions of users on a single piece of hardware.

It comes from mistakenly architecting systems as monolithic entities. No one would run a major website serving millions of users on a single piece of hardware. Why do applications stuff everything into a single process? Applications can and should be broken up into multiple pieces. The Web Browser is a great example - run each tab in its own process. Run WebGL in yet another process. Our tools could make this a lot easier. FTIW Swift may not necessarily need to bring down the entire process anyway. When it gets a concurrency story where the compiler can enforce thread boundaries at compile time it could be paired with separate heaps per thread to allow a single thread to abort without aborting the entire process. That would be ideal for the server case.