Express is still maintained, by a bunch of us, but personally I'll be focusing mostly on Koa. They're separate because conceptually Koa is quite different, the

Express is still maintained, by a bunch of us, but personally I'll be focusing mostly on Koa. They're separate because conceptually Koa is quite different, the migration from the would-be Express 3.0 -> 4.0 would mean rewriting the app