I'm always curious as to why more people don't go with a hybrid approach. For a lot of my projects, it ends up being the simplest and cleanest solution. Maybe it doesn't really scale well when you have a lot of people working on the codebase that may or may not be familiar with both the backend and frontend, but when it's a one or two person project, I don't see the issue with it. It certainly keeps things simple and prevents duplicated logic.