> I built the first version of Slimvoice on Angular 1 with a Node.js backend and MongoDB in 2014 (those were all the rage back then). In 2015 I decided to completely revamp the UI and redesigned and rebuilt it in React.

Maybe you should make decisions based on requirements instead of hype. Oh wait:

> Don't follow the hype

But using less javascript is the hype today...

> Plain Old HTML and CSS

This section only shows some very basic UI elements (dropdown, expansion panel, ...). This isn't what libraries like react solve.

> Absolutely nothing is complex about my code

I wouldn't label CSS hacks with invisible checkboxes under "simple and self-explanatory code".

> I found myself wishing for more innovation in the HTML spec

I don't think adding even more bloat to even more web standards than a browser already has to support is the anwser.