There may be 10 year old, but most people didn't work in React in 2012. 10 years ago, people were working in things like Ext.js or Backbone.js. Then, they had to learn Angular. And later, they had to learn React.
That doesn't subtract from my point, ie. that React and Node have been mainstream for many years and continue to dominate in the jobs market so how anyone with these skills can say they're not keeping up with front-end tech doesn't quite add up.