Unpoly is the best thing I've discovered in the frontend world in the last 5 years. It's a breath of fresh air when compared to all the crazyness going on.

I use it to replace almost all "api" calls to the backend and for the "turbolinks like" navigation, modals, etc. Then I use Alpinejs for the really interactive/complex parts.

I'm not doing a React/SPA ever again if I have any chance to decide on that.