I think what's helping is that a lot of us older folks (I'm 31) have been going to see summer blockbusters since we were kids. Now we're older, but still want the spectacle of those films just now dressed in a more mature tone.
That's not to say this is a blockbuster type film, it's actually the antithesis to a Summer blockbuster in many ways. But the Wolverine brand is a blockbuster brand and so allowing him to be his violent, sometimes nihilistic self was special to see
Yeah you and I are the same age so it does help we have buying power and can control that. It also helps that comic book flicks have been around for decades now and you gotta switch it up. Open them up with the storytelling. I still want to see a batman story in the vein of a true film noir or a spider man story similar to the his "no one dies" arc where he's just in costume the whole time acting on this illogical impulse to save any and everyone he can