Your email remains the same, but your lightning address might not.
This creates a frustration when you need to switch to a new lightning wallet - you have to tell everyone to use your new lightning address instead of your old lightning address.
If only Email providers could turn your email address to a lightning address...
ln2.email turns your email address <username>@<provider>.com to asimilarly-looking lightning address <username>@<provider>.com.ln2.email, with a redirection that you control.