Thanks for the feedback!
By "more built-in alert sounds", do you mean alternative sound files to chose from, or more Blender events in addition to the current baking and rendering success/cancel?
For the later, I'd be glad to receive any recommendation and see if I can add them!
But for the former, I do not plan to provide any alternative sound files: it's not trivial sourcing files that are legally usable with as few to no restrictions, versatile in usage, and sound nice both individually and as a whole pack is a bit of a task. And I do not want to make the package heavier if it's not worth it. I merely provide the bare minimum for the addon to function, and let the user free to use whatever sound file they want 🙂
This plugin is truly excellent! It would be even more perfect if there were more built - in alert sounds. Nevertheless, it remains an extremely outstanding plugin. Thank you for your efforts in developing it.