I have stubbornly avoided React. When native WebComponents became a thing, I figured I'd try them out on a small internal site I maintain. It was very slow. In an effort to reduce a bit of duplicate code, my site when from loading instantly to having a noticeable load time. Having to employ tricks to try and optimize and speed up the most basic implementation of a built-in feature seemed like the wrong move, so I ditched them all together and reverted back to my old structure.