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Impressed by how easy it's been to transition to @vitest.dev! We stuck with #Jest for years and really appreciated it, but the lack of full ESM support led us to look for alternatives. So far so good — we've migrated our entire monorepo with almost no cost🥰

What was the time investment? I'm scared that our custom expect extensions & other env stuff will be like pulling a thread 😅

It was around 10 to 30 minutes per package of the monorepo. The most impacting change has been to add the imports for it/describe/expect. But even this one can be skipped by toggling on a flag to auto-import them.