I don't think "glue" frameworks like Loco can get us there tbh. One problem is that frameworks like Django or RoR have to be tightly integrated! Auth needs to be aware of models and sessions, autogenerated admin pages like Django have to rely on model metadata, templates and view code might need to be aware of cache busting and static file handling, etc etc. It's a tough problem and a very high barrier to creating a new comprehensive framework.