Can we not use ESM imports in template files?

[mryechkin]

I'm following the docs for Template V2 and No Parser approach, and seems like the template files only work when using require and export default?

If I try the following (using import syntax), I get an error in Figma:

// url=...
import figma = 'figma';

const instance = figma.selectedInstance;

const errorText = instance.getString('text');

const code = `
import { Errors } from 'my-library';

<Errors errors={['${errorText}']} />
`;

export default {
  example: figma.code(code),
  id: 'Errors',
  metadata: {
    nestable: true,
  },
};

Same situation if I use the module.exports syntax instead of export default. What's the reason for mixing this CommonJS and ESM syntax in the template files? Can we not just use pure ESM?