Why do most plastic surgeons stay away from jaw angle implants?

Everyone wants a defined jawline and gonial angle but I’ve noticed a lot of surgeons don’t place implants in this area. While a lot of surgeons place chin and cheek implants it seems most surgeons like to stay away from mandibular angle implants. What is the reasoning behind this? Is there a high rate of complications? Is it a risky procedure? Are patients not satisfied with this procedure? It seems like I’m missing something.