There are cluster wins:

• i18n: Intl.RelativeTimeFormat, Intl.PluralRules, Intl.NumberFormat, Intl.DurationFormat, Intl.ListFormat
• HTTP Clients: fetch can be used instead of axios. Limitations: fetch doesn't reject on HTTP errors, no interceptors, no automatic retries, no upload progress.
• UI Primitives: <dialog>
• Lodash utilities
• sometime in the future: Temporal