Today, I had discussion with one potential client for our agency if Ruby on Rails application scales well comparing to other modern technological stacks to create web apps and backends for mobile apps. We discussed his startup idea. We went into other things he has to take care except for Ruby on Rails development. At the end we came to the idea I tell to everybody who start up their business.
Founders should focus on things that do not scale. It is rarely digital.
There are so many activities related to sales/marketing/administration/operations that cannot scale at even fraction of the rails scalability. If we talk about Ruby on Rails specifically, it does scale and scale well. Though, I could not resist to send an ultimate answer to the question, Can Rails Scale?
There are others that scale better and much better. But ruby on rails is most quick and flexible!