For me it's Elixir + Phoenix because it's what I build fastest with. While it's not the very most performant stack in the world, it's built for scaling and can

For me it's Elixir + Phoenix because it's what I build fastest with. While it's not the very most performant stack in the world, it's built for scaling and can handle far more users than anything I've built with has gotten. Usually for the MVP, I'll just stick with a traditional back-end MVC app and take advantage of all the Phoenix generators. As it gets a bit bigger, I might bring in Vue components on specific pages. Once an app is really getting larger, I might bring in TypeScript on the front-end. I pretty much stick with Postgres the whole way unless there's a really compelling reason to do otherwise. Disclosure: I run https://alchemist.camp https://alchemist.camp, which teaches Elixir and Phoenix, but this screencasting project was the result of how much value I found in using Elixir for my last startup, not the reason I'm a fan of it now.