I tend to buy plants and then promptly forget their names. Thanks to your article, I now know I have 7 of these that I planted in a shady spot 3 years ago. I never cut them back because I didn't know I should but I will do it this spring. Again, thanks!
Yesterday I divided my Japanese sedge, removed the solid green portions that were overtaking the desirable variegated plants, and replanted them. I potted up a dozen plants to share with friends or to put in another place in my garden when I have time to prepare them a spot.
Your plants have obviously been doing o.k. without the cutting back. I don't always get around to it, and mine have gotten along just fine.
Here are a couple of pics of the results of my efforts.