It’s impossible to predict the future. I would rather start with rails and rewrite portions later on, than start with Sinatra and shoddily reimplement rails features.

I also just think Django is terrible compared to rails, and that may be why the author has such a dim view of frameworks in general.

It’s worth noting huge companies started with frameworks initially. Just looking at rails: Twitter, Shopify, Airbnb, Basecamp, ..