I've been experimenting with ways of using Web Components with the ECS (Entity Component System) pattern. I'm not sure it will ever become the preferred way of writing web apps, but it does offer promise in exposing some alternate ways to structure Frontend code.

Here is an example Calculator App I've made: https://codesandbox.io/s/fervent-elion-isq29

And here is the ECS library I'm using (which I've written): https://github.com/brochington/ecstatic