I feel it depends on a few variables. For example, I hunt in the Maine woods. Not sure if that means a thing to you but we very seldom have long shots in my neck of the woods. For many, scopes wouldn't even be necessary up here. Where I hunt a 100 yard shot is a LONG shot, yes we have fields, but most hunt in the woods. Therefore a forty yard shot is considered a long shot.
I'm new to muzzleloading, so right now I hunt with a peep sight. The advantage is how well the gun handles and it shoots pretty good too. The disadvantage is low light situations. And we have plenty of that. So, I'm still wondering about scoping my gun. If I do, it will be a low powered scope. I just have such a thing in a Leupold VX-1 1-4. I've used it on my guide gun. I've never turned it up above 1.