Most definitely! I've been writing a small generative AI application the last few months as a side project and have been consistently impressed with how well it works in this context. Plus since there's so much writing on RoR on the Internet, it makes it really easy to program with Cursor or Github Copilot. Great choice all around. I recently wrote up some examples of how great it works with things like Web Sockets here: https://blog.spellbooks.ai/posts/move-over-spas-rails-is-bro...
Wait, are you arguing that the "developer/designer hybrid unicorn" isn't a worthwhile pursuit? I think it's these people who are the ones pushing things forward by experimenting with their designs and trying to think of new ways to approach designing for the web.