The core rails philosophy has been, and continues to be, "reasonable defaults out of the box". In other words, if you are running `rails new` today, you should just start day 1 with the things that are preconfigured. One day you may need React/tailwind/etc, but vanilla rails will ship you to prod just fine on day 1 without configuring anything.

That doesnt mean you should rewrite an existing app to a more 'vanilla rails' config. You've already eaten the migration cost.