No, to the contrary, we use them quite a lot here in OR. Many of the cultivars like "firepower", "moon bay" and "moyer's red" are among our favorites. And the nurseries sell hoards of them. I am surprised you didn't see much of them. They are all over. Although the cultivars I mention above are becoming a lot more popular than the original. "Firepower" especially is seen everywhere. From commercial properties to upper end resindential. Next time you visit Oregon let me show you around But even the largest of the group (the regular Nandina domestica) doesn't particularly lend itself to becoming a hedge. Not a very balanced one anyway. It tends to be more thin at the bottom and bulky only at the top. I've never seen it made into a hedge in all of my years in the nursery or landscaping biz. But maybe that's just around here. I dunno. Maybe in different climates it behaves differently.