My experience is the opposite. I say that from a career that is dominated by backend experience. In any application, you have to have a good front end. To mo

My experience is the opposite. I say that from a career that is dominated by backend experience. In any application, you have to have a good front end. To most users the app/page is the UI. Having the majority of your concerns in one place will help you develop with smaller teams. Certain SPA architectures can bring nearly ALL of the concerns into the front end. Particularly with databases that are simply port open to the world like say couchdb. Your backend needs almost effectively disappear. If this is a reasonable data model, SPA looks and feels much faster to use and develop. When you attach a backend, you often attach other specialists, languages, techs (python, ruby, Java). Have to deal with separate teams, which often means a formal API and all the handshaking between. This pretty much triples the required work with development and the communication overhead.