I also like Unpoly very much.

I'm using it for a new frontend right now. Combined with a thoughtful CSS design like CUBE[1] that utilizes components but also leverages utilities to reduce CSS bloat I am writing mostly Ruby and HTML and very little JS and CSS and it feels great.

It's kind of back to the basics which means that I also do not worry about being on some framework's upgrade & dependency train or the mental health of future application developers/maintainers.

[1]: https://piccalil.li/blog/i-used-tailwind-for-the-u-in-cube-c...