None of this stuff is that much work. People are really overestimating how hard it is, and you realize it once you try it. It's just people aren't familiar.

https://mithril.js.org/simple-application.html

Here's another app in another framework. Hard to get easier. I've built GUI and terminal applications, this is easier than both.

  import { h, app } from "hyperapp"

  const state = {
    count: 0
  }

  const actions = {
    down: () => state => ({ count: state.count - 1 }),
    up: () => state => ({ count: state.count + 1 })
  }

  const view = (state, actions) => (
    <main>
      <h1>{state.count}</h1>
      <button onclick={actions.down}>-</button>
      <button onclick={actions.up}>+</button>
    </main>
  )

  const main = app(state, actions, view, document.body)