This is a very confusing, and then disappointing, article. It starts by describing what is, essentially, plain javascript or how you'd use jQuery in the old da

This is a very confusing, and then disappointing, article. It starts by describing what is, essentially, plain javascript or how you'd use jQuery in the old days. Attaching events to the DOM at startup is not hydration. Then it starts describing what seems to be React's particular flavour of hydration, where it re-renders the entire app before applying its diff/reconciliation algorithm. But in a very roundabout way, it's not clear what they are even talking about. Not every framework works like that. And, it's definitely not the heaviest part, diffing the DOM can be extremely fast. The slowness comes from, erm, everything else and just the sheer amount of code these frameworks run. By the third section, I had the feeling this would be an advertisement for Qwik, because of the 'closure around app state' concept, and how they appear to believe that lazy loading everything is the best idea since sliced bread. Bingo :)