Indeed, that's true. While I'm not saying they're good for everything, one thing I like about SPAs is that the server can just serve up an API that is usable by

Indeed, that's true. While I'm not saying they're good for everything, one thing I like about SPAs is that the server can just serve up an API that is usable by both web and mobile clients. No duplication of templating/view logic between server and client as often happens when the server is serving up HTML.