The Original Problem was in relation to a Challenger 604.
So believe me.. I can see the runway as long as I do not crap 90 degrees
We are coming with almost negative attitude and need to do a serious flare to get the nose up for a main gear landing.
But this is not the problem.
I am more worried about the "bouncing around" in the wind. we have 20 meters and 35.000 lbs weight during landing.
So there is nothing like "energy" which will keep you going no matter what.
Out of my point of view now, it doesnt make too much sense for us for speed reasons:
Flaps 30 max 197
Flaps 45 max 189
When you add the additional 7 knots to F45 for less flap setting you end up with you won 1 single knot. 189+7=196
Guess it might be more comfortable anyways as you are further away from Stall speed and have a little more energy.