I found these things hard: * Inconsistencies or duplicated code between initial render and updates. * Having to write code for N^2 transitions between N valid

I found these things hard: * Inconsistencies or duplicated code between initial render and updates. * Having to write code for N^2 transitions between N valid states instead of N valid states themselves. * Harder to ensure DOM operation order across different parts of the codebase doesn’t produce jank. Sure, this is all possible to solve, but in my experience I just ended up with a crappy version of React.