Static web apps are excellent for things like webmail, Google Docs, etc. that aren't going to be crawled. It's simpler there, and is probably how things should

Static web apps are excellent for things like webmail, Google Docs, etc. that aren't going to be crawled. It's simpler there, and is probably how things should work in a hypothetical non-web-based but still deployed-web-style app ecosystem. For a blog, or a forum system, or twitter, or anything that should be crawled and linked to and shared, it doesn't really make sense, and "pages and forms" makes much more sense.