[gravity13]

> "react's complexity isn't worth saving 5 lines of code" which people would agree with.

If you look at the code the example shows, the replication is a bunch of HTML and tailwind CSS classes in backbone. So basically if you decide you want to change the input to have a different radius in one place, you need to implicitly know that there's another piece of code patching and replacing that elsewhere, which has duplicated the code.

I'm not one to pray to the alter of DRY like it's the end-all be-all of programming principles, but you take this pattern and repeat it throughout a production codebase and you have a bunch of repetitions that need to happen.

This is the problem with Backbone - it's edits are imperative - meaning, each one is a source of errors. React makes state updates declarative, so you only need write the rules just once. Somebody coming along to edit the code doesn't need to find the implicit relationships in the imperative code that might break or cause inconsistency, because they don't need to exist anymore.

React is safer. It's not even a contest.