Notification Volume Slider

I find that when I adjust my output volume to a level that works well for my system, the notifications are unbearably loud. I don't want to mute notifications entirely, I'd just like to turn them down to a more reasonable level. I understand that this is technically possible through the volume mixer, but those settings typically reset on their own which makes maintaining it a pain. This has been a feature many people have been wanting for years, so I'm just going to add my request to the pile in the hopes that the company will eventually act on it.