The Power of no Web Framework!
This is my own example on why frameworks should be used only for very complicated webapps and not simple things that require only a little DOM manipulation.
Many webapps nowadays abuse frameworks to the point where the hypothetical no-framework alternative is lighter and more performative An example of such a website is medium.com. Compare this to YouTube which has one of the slickest UIs and UX, which did take them years to perfect.