Move on to ESM-only

Three years ago, I wrote a post about shipping ESM & CJS in a single package, advocating for dual CJS/ESM formats to ease user migration and trying to make the best of both worlds. Back then, I didn’t fully agree with aggressively shipping ESM-only, as I considered the ecosystem wasn’t ready, especially since the push was mostly from low-level libraries. Over time, as tools and the ecosystem have evolved, my perspective has gradually shifted towards more and more on adopting ESM-only. .