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> Who changes only a few files to esmodules? You either change your whole project or not at all.

Transition. It’s a much lighter lift to transform a project piece by piece than do the whole thing.

Bun handles all of the nonsense but the catch is that it blows up both in dev and in production. Wake me up when Bun doesn't segfault/fail to work at all.

Does it actually handle it though? I use bun to run my remix app at work and I have run into ESM/CJS issues.

I look forward to the day when Bun can run Next.js. Apparently the main showstopper is in the Next.js router.

I'm not steeped in the history of this issue but I periodically run a maintained and up to date NextJS app via Bun in a dev env just to monitor performance and compatibility. It uses the app router and the edge runtime middleware, hosted from a Docker container. I haven't seen massive benefits using Bun since Next doesn't use the Bun-specific libraries that make their performance numbers great, but I haven't seen any game breaking issues either, it runs and all the app's E2Es pass.