I replaced at least 3 of them, out of the 8 I originally bought. They were more finicky than I expected!
The whole project started because we had flooding issues (from the house next door) in this area of the backyard. We were aware when we bought our place last year. The house next door is owned by an 85 year old woman who's lived there 45 years and is very aware of the issues. She's pleasant and friendly and has no intention of addressing her issues.
We told her in advance that we were putting in this berm, and the landscaper even met with her to attempt a joint kind of project. He told us later that she chuckled at the cost and thanked him for his time, so we just did it.
We put in a top row of ilex bushes (should only top out at 8'), then the row of Magnus, then the Black-Eyed Susans. He stressed getting stuff in the berm to stabilize it.
Some random pics of the project (this is the side of her garage - small yards!):
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Berm extended up along her driveway (again, her garage), where rainwater was also pouring into our yard:
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And afterwards:
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It wasn't cheap! But needed to be done.