When I learned it back in 2015 there were so many resources for learning, it felt like every time I had a specific problem related to a feature I was implementing there was either a railscasts or gorails video on it, along with 10 blog posts and stack overflow results. I can only imagine how much better it is now.
It has been one of the only semi-modern learning experiences where I was able to go from ground zero to building a real application just by reading the docs, getting started guides and Googling.
Opinions combined with a massive community are an awesome combo.
It's definitely noticeable when you try to learn a newer framework with a much smaller community and less opinions. You could end up Googling for what you might think is a common thing to solve only to find zero answers in sight, or there might be a few scattered posts that are outdated and partially implemented because everyone has their own opinions and go off in their own directions. It's just dead end after dead end and getting stuck trying to pioneer stuff without a strong grasp on how things work.