As usual, isn't the next question... "What are you trying to build?"
I build most projects in Elixir/Phoenix these days, but wouldn't flinch at ROR if you are comfortable with it.
Right now, an AI tool that generates mockups for branding agencies. But I’m still validating the idea so who knows. Ideally, I would like a stack that would work for most SaaS I may think of building. Tempted to give Elixir Phoenix a try. I briefly tried it a few years back and it just felt right.
>What are you trying to build?
Indeed. Not everything even has to be a "web app" in the first place.