They been around for some time, just don't think they have ever went huge. I think alot of there stuff ends up behind commercial (small) diesels' but don't quote me on that.
Knew a fella that had them on a 32' Aero with no Problems.
And Another fella Around her Craig Ellis put a new pair on a
35'ish Cigarette about 5 years ago with no problems.
Hope that helps ya some.