I recently switched back to Rails after 7 or so years seeking (part-time) a better option, and wow....Rails and Ruby are still beautiful and my productivity has spiked tremendously. I'm finding https://hotwired.dev/ to be awesome, and was able to develop an interactive data grid in less than an hour.

If you haven't tried Rails lately because it's no longer cool, I encourage you to look again. I've tried many different frameworks, including Flask, but nothing touches Rails (IMHO) in terms of productivity.