This is the cycle of JavaScript frameworks. You create something deceivingly simple that tramples upon idiomatic usage but looks great for a todo app. Beginners realize the hard way that this doesn't scale because deep reactivity shouldn't be a default, they no longer know what a vanilla JS variable should behave like, and code is un-readable.
Let the bundler minify your JavaScript. Less characters !== simple.
Let the bundler minify your JavaScript. Less characters !== simple.