[theonething]

I agree with this. In my experience, adding React or friends doubles the size and complexity of your application and in a lot of cases, the benefits accrued are not worth it. You essentially end up having two applications to maintain and therefore two places to manage state and make sure they sync correctly.

I commented below that I hope frameworks like Phoenix LiveView will be the future. Seems like the best of both worlds, the simplicity of server side html rendering with SPAlike interactivity. Of course not perfectly. There are tradeoffs no matter what decisions you make.