I dunno bout chopping the power to idle in a 900 at 50 ft but at over the threshold I’m walking the power back from 60 something N1to about 50%@50ft. At 30ft quickly walking it back to idle (not just chopping it) equals right in the touch down zone and smooth a majority of the time. This requires being no more than top of the bug though otherwise you’ll float.
I could see the power being chopped at 50 if you’re 5-10kts above ref over the threshold and light... and the comments about proper energy management... I mean yeah it’s doable trimmed out properly and arresting the sinkrate, but that’s a ballsy move that will eventually come back to bite you... like leaving the power in during touchdown instead of idle it may work, but it def isn’t a good idea / sop. Of course weight / environment will change everything above but seems like a good starting point.