Question: bundel a node package

Hi,

I'm thinking of bundling a node server into a single file to make it "portable".

However, when reading the [documentation](https://tsup.egoist.sh/#excluding-all-packages) I see:

> If you are using tsup to build for Node.js applications/APIs, usually bundling dependencies is not needed, and it can even break things, for instance, while outputting to [ESM](https://nodejs.org/api/esm.html).

If I'm not outputting ESM, are there any other cases that could break the code? For example, how is tsup handling imports of wasm files?

Thanks!