"Am I totally off base stating that Phoenix/Elixir is used in the same places React is?" There are so many things to consider when deciding upon an architectur

"Am I totally off base stating that Phoenix/Elixir is used in the same places React is?" There are so many things to consider when deciding upon an architecture that the choice of going SPA + "regular" backend tech (js, php, whatever) vs something as specific as phoenix + elixir + server side rendering is really not a matter of "react" or something else. A few questions you'll have to ask : what if you want to add a mobile GUI, will you want to keep rendering everything on the server ? How will you fetch the data ? Should the GUI (either mobile or web) work offline ? If you go mobile will you want to benefit from reusing react patterns ? Now purely on the server side, erlang VM is highly optimized for concurrency (and not so much at pure cpu), but elixir is also a very peculiar language. How will you recruit people ? Is your team used to functional programming ? Do you have the skills to go to C programming in case you need performance ? Then comes deployment. Will you plan on using OTP and actor-based architecture, for maximum availability ? Do you want to deploy on google cloud using kubernetes ? Heroku ? App-engine ? Each of these options have implications on your stack. etc, etc. I could go on forever. The post you mentionned only talked about the most basic thing every single tech has been able to do for the last 30 years, aka : render a web page from a template. But that's a very very narrow consideration for picking a tech stack.