I think the question is more about "Use them as is, but what if we go wider later?" maybe?
I have never put a flare up against the new fenders Jedeka, but they might be large enough to allow you to cut out more of the new style fenders to fit. I don't know if they're the same shape and size as the new openings, to the point you could just bolt them on without cutting to get a wider coverage.
Not a lot of them out there yet, but we've seen a few. I'll see if I can find one out of the box this weekend at our swap meet and lay a Warflare over it to get an idea of size and shape.
If they're not the same and you have to cut, I'd say most people would not want to go that route. And so many owners just let their tires stick out past even the fender flares, that not a lot of them are going to add even more flare anyway. They'll just run the tires wide.
Which means data points will be few and far between.
Hopefully I can put the two together and see.
Paul