For me it's the ability to use a custom domain. See https://lorendb.dev/posts/the-case-for-custom-email-domains/ https://lorendb.dev/posts/the-case-for-custom-e

For me it's the ability to use a custom domain. See https://lorendb.dev/posts/the-case-for-custom-email-domains/ https://lorendb.dev/posts/the-case-for-custom-email-domains/ for my reasoning why I do this.