[yellowapple]

Video game mods are the first use case that comes to mind for me. If you want to add new voice lines for a character, your options are:

1. don't (keep it silent);

2. recruit the original VA somehow;

3. recruit an alternative VA (who hopefully sounds close enough to the original to not be jarring);

4. splice voice lines together from existing voice lines; or

5. use text-to-speech.

Voice cloning is just Option 5 but with results much closer to Options 2 and 3.