React Email 3.0 has been released with a faster development experience, featuring a collection of pre-built components that can be used to create beautiful emails. The new version includes 54 components across various categories, making it easier for developers to build elegant UIs. React Email now boasts improved performance, with startup times reduced by massive amounts compared to the previous version. The new release also addresses compatibility issues with upcoming React versions and introduces a new `render` function that is async by default. Additionally, Supabase has released an email hook feature that allows users to customize their authentication emails using React Email templates.