Because maybe other people might read this:

Rails are good enough to keep Shopify standing for another year of holiday sales. It seems to do that since 2006, so this alone demonstrates that Rails can support you a long way in your multi-billion business.

And if you think: "yes, but Shopify has a big talented team," I feel the need to say back, "Well, when you are at Shopify business size, you will have it too. And Shopify used it when they were small too."

I am not saying Rails fits everything, but if your business fits Rails, that is a great framework to build with.