I shipped tons of production applications with above stack (Sinatra + PostgreSQL) (even without Dockerfile). That's my experience though. This roadmap, i'm not

I shipped tons of production applications with above stack (Sinatra + PostgreSQL) (even without Dockerfile). That's my experience though. This roadmap, i'm not sure who's the intended audiences. In reality, most of tech choices is not for tech reason, most of them is to ease the hiring process. But i guess if it's for technical reason, nothing beats simplicity.