alt Hacker NewsReact and the react ecosystem fail at many of the criteria you’ve listed. You might argue “that’s not reacts fault” but when I look at a website that takes 15+ seconds to load its content on a gigabit connection , I’m never surprised when it’s react. Lots of sites have massive issues with rendering performance, scalability and maintainability even with react.
What react does do is give you a clean separation of concerns across team boundaries and allow for reusable components . But the cost you pay for that is a boat load of overhead, complexity, maintainability concerns, and react specific edge cases
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I think companies should make web developers use a decade-old bargain-basement laptop at least once a month.
Each team member could take their turn using it so that it's already tooled up for the project they are working on.
A 15+ second load on a gigabit connection is impossible to have anything to do with the React library, as React is only kilobytes big and has no impact on the host.