“And asking developers to write the correct memo code is a losing battle.”
Lit, Solid, Svelte and Vue all converged on push-based reactivity, while React still assumes the whole virtual DOM tree needs rebuilding. Lawson’s benchmark has cloning a parsed template running about 50% faster than building nodes by hand in Chrome. The post-React frameworks look more like each other than like React. React’s answer is still to make developers babysit memo calls.