In my experience working in other technologies, 50-80% of my time is spent solving technology problems and what's left is used to solve actual business problems. These technology problems are tasks such as building out database connections, setting up boilerplate, writing build pipelines, etc. Meanwhile with Rails I've noticed I get to spend spent the vast majority of my time focusing on business logic. I've seen several projects where progress was greatly hindered by the technology getting in the way of the solution. In Rails I've seen much less of this.
I like to be a champion for the business, I want to solve the customers' problems and facilitate the growth of the company. Ruby and Rails gives me that power more so than any other technology I've used. If you're a developer or entrepreneur about to start a new endeavor, I highly recommend you consider Ruby for that project. You will find it to be a competitive advantage as you will be able to grow and adapt faster and with fewer resources.