The simple, sad answer is....not much
In my youth I hunted and shot trap
But I am not much of a hunter any more
I have been resisting the sporting clays addiction (so far)
And as far as defensive uses, I am afraid that I don't see much that a carbine will not do better...I see shotguns as a "niche armament" with a smoewhat more narrow engagement range than other long guns
But don't get me wrong....all firearms are intrinsically good
we all need more.....lots more
And I still practice occaisonally with my 590