Migration from v9 to v10 retains tsconfig module value as esnext

After the migration to Angualr 10, the value of my tsconfig.base.json module looks like `esnext`. For a newly created project, I found out that the option is set as `es2020` due to https://github.com/angular/angular-cli/pull/17637. Is it worth setting `es2020` for an existing project?
